Merge pull request #83 from ineszang/feat/endpoint-sensors-status

feat(backend): expose GET /api/v1/sensors/status

apps/backend/app/api/deps.py

@@ -32,6 +32,7 @@ from app.repositories.user import UserRepository
 from app.services.alert import AlertService
 from app.services.auth import AuthService, LoginPolicy
 from app.services.recommendation import RecommendationService
+from app.services.sensor import SensorService
 from app.services.site import SiteService
 from app.services.stats import StatsService
 from app.services.user import UserService
@@ -167,6 +168,13 @@ def get_stats_service(session: SessionDep) -> StatsService:
 StatsServiceDep = Annotated[StatsService, Depends(get_stats_service)]
 
 
+def get_sensor_service(session: SessionDep) -> SensorService:
+    return SensorService(sites=SiteRepository(session), readings=ReadingRepository(session))
+
+
+SensorServiceDep = Annotated[SensorService, Depends(get_sensor_service)]
+
+
 async def get_current_principal(
     credentials: CredentialsDep,
     session: SessionDep,

apps/backend/app/api/openapi.py

@@ -71,6 +71,10 @@ TAGS: Final[list[dict[str, Any]]] = [
         "description": "Statistiques agrégées de consommation. Accessible à partir du rôle "
         "`lecteur`.",
     },
+    {
+        "name": "sensors",
+        "description": "État de santé des capteurs par site. Réservé au rôle `admin`.",
+    },
 ]
 
 cookie_de_rafraichissement = APIKeyCookie(

apps/backend/app/api/v1/endpoints/sensors.py

@@ -0,0 +1,16 @@
+from fastapi import APIRouter
+
+from app.api.deps import AdminDep, SensorServiceDep
+from app.schemas.sensor import SensorStatusResponse
+
+router = APIRouter()
+
+
+@router.get(
+    "/status",
+    response_model=SensorStatusResponse,
+    summary="État de santé des capteurs par site",
+)
+async def get_status(_: AdminDep, service: SensorServiceDep) -> SensorStatusResponse:
+    etat = await service.status()
+    return SensorStatusResponse.model_validate(etat)

apps/backend/app/api/v1/router.py

@@ -1,7 +1,7 @@
 from fastapi import APIRouter
 
 from app.api.openapi import REPONSE_SERVEUR, REPONSES_ADMIN, REPONSES_LECTEUR
-from app.api.v1.endpoints import alerts, auth, health, recommendations, sites, stats, users
+from app.api.v1.endpoints import alerts, auth, health, recommendations, sensors, sites, stats, users
 
 api_router = APIRouter(responses=REPONSE_SERVEUR)
 api_router.include_router(health.router, prefix="/health", tags=["health"])
@@ -18,3 +18,6 @@ api_router.include_router(
     responses=REPONSES_LECTEUR,
 )
 api_router.include_router(stats.router, prefix="/stats", tags=["stats"], responses=REPONSES_LECTEUR)
+api_router.include_router(
+    sensors.router, prefix="/sensors", tags=["sensors"], responses=REPONSES_ADMIN
+)

apps/backend/app/schemas/sensor.py

@@ -0,0 +1,42 @@
+from datetime import datetime
+from typing import Literal
+
+from pydantic import BaseModel, ConfigDict, Field
+
+
+class SensorDiagnosticResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    status: Literal["ok", "failing"]
+    since: datetime | None = Field(
+        description=(
+            "Horodatage de la dernière lecture reçue pour ce site. Ce n'est pas le début de la "
+            "panne : l'historique ne permet pas de le dater sans requête supplémentaire."
+        )
+    )
+
+
+class SiteSensorsResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    consumption: SensorDiagnosticResponse
+    electrical: SensorDiagnosticResponse
+    temperature: SensorDiagnosticResponse
+    humidity: SensorDiagnosticResponse
+    network: SensorDiagnosticResponse
+
+
+class SiteSensorStatusResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    site_id: str
+    site_name: str
+    sensors: SiteSensorsResponse
+    overall: Literal["ok", "degraded", "critical"]
+
+
+class SensorStatusResponse(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    timestamp: datetime
+    sites: list[SiteSensorStatusResponse]

apps/backend/app/services/sensor.py

@@ -0,0 +1,137 @@
+from dataclasses import dataclass
+from datetime import UTC, datetime
+from typing import Literal
+
+from app.models.energy import Reading, Site
+from app.repositories.reading import ReadingRepository
+from app.repositories.site import SiteRepository
+
+CapteurStatus = Literal["ok", "failing"]
+OverallStatus = Literal["ok", "degraded", "critical"]
+
+QUALITES_CONNUES: frozenset[str] = frozenset({"good", "partial", "degraded", "critical"})
+
+RAISON_VERS_CAPTEUR: dict[str, str] = {
+    "consumption_sensor_failure": "consumption",
+    "electrical_sensor_failure": "electrical",
+    "temperature_sensor_failure": "temperature",
+    "humidity_sensor_failure": "humidity",
+    "network_loss": "network",
+}
+
+CHAMPS_PAR_CAPTEUR: dict[str, tuple[str, ...]] = {
+    "consumption": ("consumption_kw",),
+    "electrical": ("voltage_v", "current_a", "power_factor"),
+    "temperature": ("temperature_celsius",),
+    "humidity": ("humidity_percent",),
+}
+
+
+@dataclass(frozen=True, slots=True)
+class DiagnosticCapteur:
+    status: CapteurStatus
+    since: datetime | None
+
+
+@dataclass(frozen=True, slots=True)
+class SanteCapteurs:
+    consumption: DiagnosticCapteur
+    electrical: DiagnosticCapteur
+    temperature: DiagnosticCapteur
+    humidity: DiagnosticCapteur
+    network: DiagnosticCapteur
+
+
+@dataclass(frozen=True, slots=True)
+class SanteSite:
+    site_id: str
+    site_name: str
+    sensors: SanteCapteurs
+    overall: OverallStatus
+
+
+@dataclass(frozen=True, slots=True)
+class EtatCapteurs:
+    timestamp: datetime
+    sites: list[SanteSite]
+
+
+class SensorService:
+    def __init__(self, sites: SiteRepository, readings: ReadingRepository) -> None:
+        self._sites = sites
+        self._readings = readings
+
+    async def status(self) -> EtatCapteurs:
+        sites = await self._sites.list_all()
+        dernieres = {lecture.site_id: lecture for lecture in await self._readings.latest_by_site()}
+
+        return EtatCapteurs(
+            timestamp=datetime.now(UTC),
+            sites=[_sante_site(site, dernieres.get(site.site_id)) for site in sites],
+        )
+
+
+def _sante_site(site: Site, derniere: Reading | None) -> SanteSite:
+    if derniere is None:
+        return SanteSite(
+            site_id=site.site_id,
+            site_name=site.site_name,
+            sensors=_tout_en_echec(since=None),
+            overall="critical",
+        )
+
+    qualite = derniere.data_quality if derniere.data_quality in QUALITES_CONNUES else "critical"
+    overall = _overall_depuis_qualite(qualite)
+
+    if overall == "critical":
+        return SanteSite(
+            site_id=site.site_id,
+            site_name=site.site_name,
+            sensors=_tout_en_echec(since=derniere.timestamp),
+            overall="critical",
+        )
+
+    raisons_signalees = {
+        RAISON_VERS_CAPTEUR[raison]
+        for raison in (derniere.null_reasons or [])
+        if raison in RAISON_VERS_CAPTEUR
+    }
+
+    return SanteSite(
+        site_id=site.site_id,
+        site_name=site.site_name,
+        sensors=SanteCapteurs(
+            consumption=_diagnostic("consumption", derniere, raisons_signalees),
+            electrical=_diagnostic("electrical", derniere, raisons_signalees),
+            temperature=_diagnostic("temperature", derniere, raisons_signalees),
+            humidity=_diagnostic("humidity", derniere, raisons_signalees),
+            network=_diagnostic("network", derniere, raisons_signalees),
+        ),
+        overall=overall,
+    )
+
+
+def _overall_depuis_qualite(qualite: str) -> OverallStatus:
+    if qualite == "good":
+        return "ok"
+    if qualite in ("partial", "degraded"):
+        return "degraded"
+    return "critical"
+
+
+def _diagnostic(capteur: str, derniere: Reading, raisons_signalees: set[str]) -> DiagnosticCapteur:
+    champs = CHAMPS_PAR_CAPTEUR.get(capteur, ())
+    en_echec = capteur in raisons_signalees or any(
+        getattr(derniere, champ) is None for champ in champs
+    )
+    return DiagnosticCapteur(
+        status="failing" if en_echec else "ok",
+        since=derniere.timestamp if en_echec else None,
+    )
+
+
+def _tout_en_echec(since: datetime | None) -> SanteCapteurs:
+    echec = DiagnosticCapteur(status="failing", since=since)
+    return SanteCapteurs(
+        consumption=echec, electrical=echec, temperature=echec, humidity=echec, network=echec
+    )

apps/backend/openapi.json

@@ -1227,6 +1227,62 @@
           }
         ]
       }
+    },
+    "/api/v1/sensors/status": {
+      "get": {
+        "tags": [
+          "sensors"
+        ],
+        "summary": "État de santé des capteurs par site",
+        "operationId": "get_status_api_v1_sensors_status_get",
+        "responses": {
+          "200": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/SensorStatusResponse"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Erreur interne. `correlation` identifie la trace côté serveur, qui n'est pas renvoyée au client.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/InternalErrorResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Jeton absent, illisible, périmé, ou rendu caduc par un changement de rôle ou une désactivation. L'en-tête `WWW-Authenticate` porte la cause dans `error=`.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Droits insuffisants, ou mot de passe provisoire à changer quand `detail` vaut `password_change_required`.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "Jeton d'accès": []
+          }
+        ]
+      }
     }
   },
   "components": {
@@ -1572,6 +1628,59 @@
         ],
         "title": "Role"
       },
+      "SensorDiagnosticResponse": {
+        "properties": {
+          "status": {
+            "type": "string",
+            "enum": [
+              "ok",
+              "failing"
+            ],
+            "title": "Status"
+          },
+          "since": {
+            "anyOf": [
+              {
+                "type": "string",
+                "format": "date-time"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Since",
+            "description": "Horodatage de la dernière lecture reçue pour ce site. Ce n'est pas le début de la panne : l'historique ne permet pas de le dater sans requête supplémentaire."
+          }
+        },
+        "type": "object",
+        "required": [
+          "status",
+          "since"
+        ],
+        "title": "SensorDiagnosticResponse"
+      },
+      "SensorStatusResponse": {
+        "properties": {
+          "timestamp": {
+            "type": "string",
+            "format": "date-time",
+            "title": "Timestamp"
+          },
+          "sites": {
+            "items": {
+              "$ref": "#/components/schemas/SiteSensorStatusResponse"
+            },
+            "type": "array",
+            "title": "Sites"
+          }
+        },
+        "type": "object",
+        "required": [
+          "timestamp",
+          "sites"
+        ],
+        "title": "SensorStatusResponse"
+      },
       "SiteResponse": {
         "properties": {
           "site_id": {
@@ -1631,6 +1740,66 @@
         ],
         "title": "SiteResponse"
       },
+      "SiteSensorStatusResponse": {
+        "properties": {
+          "site_id": {
+            "type": "string",
+            "title": "Site Id"
+          },
+          "site_name": {
+            "type": "string",
+            "title": "Site Name"
+          },
+          "sensors": {
+            "$ref": "#/components/schemas/SiteSensorsResponse"
+          },
+          "overall": {
+            "type": "string",
+            "enum": [
+              "ok",
+              "degraded",
+              "critical"
+            ],
+            "title": "Overall"
+          }
+        },
+        "type": "object",
+        "required": [
+          "site_id",
+          "site_name",
+          "sensors",
+          "overall"
+        ],
+        "title": "SiteSensorStatusResponse"
+      },
+      "SiteSensorsResponse": {
+        "properties": {
+          "consumption": {
+            "$ref": "#/components/schemas/SensorDiagnosticResponse"
+          },
+          "electrical": {
+            "$ref": "#/components/schemas/SensorDiagnosticResponse"
+          },
+          "temperature": {
+            "$ref": "#/components/schemas/SensorDiagnosticResponse"
+          },
+          "humidity": {
+            "$ref": "#/components/schemas/SensorDiagnosticResponse"
+          },
+          "network": {
+            "$ref": "#/components/schemas/SensorDiagnosticResponse"
+          }
+        },
+        "type": "object",
+        "required": [
+          "consumption",
+          "electrical",
+          "temperature",
+          "humidity",
+          "network"
+        ],
+        "title": "SiteSensorsResponse"
+      },
       "SiteSummaryResponse": {
         "properties": {
           "site_id": {
@@ -1959,6 +2128,10 @@
     {
       "name": "stats",
       "description": "Statistiques agrégées de consommation. Accessible à partir du rôle `lecteur`."
+    },
+    {
+      "name": "sensors",
+      "description": "État de santé des capteurs par site. Réservé au rôle `admin`."
     }
   ]
 }

apps/backend/tests/api/test_openapi.py

@@ -35,6 +35,7 @@ ROUTES_A_ROLE = {
     ("GET", "/api/v1/recommendations"),
     ("GET", "/api/v1/recommendations/{recommendation_id}"),
     ("GET", "/api/v1/stats/summary"),
+    ("GET", "/api/v1/sensors/status"),
 }
 
 

apps/backend/tests/api/test_sensors.py

@@ -0,0 +1,91 @@
+from collections.abc import Callable, Iterator
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from fastapi import FastAPI
+from httpx import AsyncClient
+
+from app.api.deps import get_current_principal, get_sensor_service
+from app.core.principal import Principal
+from app.core.roles import AccountKind, Role
+from app.services.sensor import DiagnosticCapteur, EtatCapteurs, SanteCapteurs, SanteSite
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+def principal(role: Role = Role.ADMIN) -> Principal:
+    return Principal(
+        id=uuid4(),
+        email=f"{role.value}@enervision.fr",
+        role=role,
+        kind=AccountKind.HUMAIN,
+        must_change_password=False,
+    )
+
+
+class FauxService:
+    def __init__(self) -> None:
+        ok = DiagnosticCapteur(status="ok", since=None)
+        en_echec = DiagnosticCapteur(status="failing", since=TIMESTAMP)
+        self.etat = EtatCapteurs(
+            timestamp=TIMESTAMP,
+            sites=[
+                SanteSite(
+                    site_id="SITE001",
+                    site_name="Bureau Paris La Défense",
+                    sensors=SanteCapteurs(
+                        consumption=ok,
+                        electrical=ok,
+                        temperature=en_echec,
+                        humidity=ok,
+                        network=ok,
+                    ),
+                    overall="degraded",
+                )
+            ],
+        )
+
+    async def status(self) -> EtatCapteurs:
+        return self.etat
+
+
+@pytest.fixture
+def admin_connecte(app: FastAPI) -> Iterator[None]:
+    app.dependency_overrides[get_current_principal] = lambda: principal()
+    yield
+    app.dependency_overrides.pop(get_current_principal, None)
+
+
+@pytest.fixture
+def servi(app: FastAPI, admin_connecte: None) -> Iterator[Callable[[], FauxService]]:
+    def installe() -> FauxService:
+        service = FauxService()
+        app.dependency_overrides[get_sensor_service] = lambda: service
+        return service
+
+    yield installe
+    app.dependency_overrides.pop(get_sensor_service, None)
+
+
+async def test_get_status_returns_the_service_result(
+    servi: Callable[[], FauxService], client: AsyncClient
+) -> None:
+    servi()
+
+    response = await client.get("/api/v1/sensors/status")
+
+    assert response.status_code == 200
+    corps = response.json()
+    assert corps["sites"][0]["site_id"] == "SITE001"
+    assert corps["sites"][0]["overall"] == "degraded"
+    assert corps["sites"][0]["sensors"]["temperature"]["status"] == "failing"
+    assert corps["sites"][0]["sensors"]["consumption"]["status"] == "ok"
+
+
+async def test_get_status_refuses_a_reader(app: FastAPI, client: AsyncClient) -> None:
+    app.dependency_overrides[get_current_principal] = lambda: principal(Role.LECTEUR)
+
+    response = await client.get("/api/v1/sensors/status")
+
+    assert response.status_code == 403

apps/backend/tests/services/test_sensor.py

@@ -0,0 +1,224 @@
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+
+from app.services.sensor import SensorService
+
+TIMESTAMP = datetime(2026, 9, 16, 12, 0, tzinfo=UTC)
+
+
+@dataclass
+class FauxSite:
+    site_id: str
+    site_name: str
+
+
+@dataclass
+class FauxLecture:
+    site_id: str
+    timestamp: datetime
+    data_quality: str | None
+    null_reasons: list[str] | None = field(default_factory=list)
+    consumption_kw: float | None = 10.0
+    voltage_v: float | None = 230.0
+    current_a: float | None = 5.0
+    power_factor: float | None = 0.95
+    temperature_celsius: float | None = 21.0
+    humidity_percent: float | None = 40.0
+
+
+class FauxDepotSites:
+    def __init__(self, sites: list[FauxSite]) -> None:
+        self._sites = sites
+
+    async def list_all(self) -> list[FauxSite]:
+        return self._sites
+
+
+class FauxDepotLectures:
+    def __init__(self, lectures: list[FauxLecture]) -> None:
+        self._lectures = lectures
+
+    async def latest_by_site(self) -> list[FauxLecture]:
+        return self._lectures
+
+
+async def test_status_marks_a_site_without_any_reading_as_critical_with_every_sensor_failing() -> (
+    None
+):
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "critical"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "failing"
+        assert capteur.since is None
+
+
+async def test_status_marks_every_sensor_ok_on_a_good_quality_reading_with_no_null_field() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, "good")]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "ok"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "ok"
+        assert capteur.since is None
+
+
+async def test_status_flags_the_sensor_named_in_null_reasons() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [
+                FauxLecture(
+                    "A",
+                    TIMESTAMP,
+                    "partial",
+                    null_reasons=["temperature_sensor_failure"],
+                    temperature_celsius=None,
+                )
+            ]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "degraded"
+    assert site.sensors.temperature.status == "failing"
+    assert site.sensors.temperature.since == TIMESTAMP
+    assert site.sensors.consumption.status == "ok"
+    assert site.sensors.electrical.status == "ok"
+    assert site.sensors.humidity.status == "ok"
+    assert site.sensors.network.status == "ok"
+
+
+async def test_status_flags_a_sensor_from_a_null_field_even_without_a_null_reason() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "partial", null_reasons=[], humidity_percent=None)]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.sensors.humidity.status == "failing"
+    assert site.sensors.humidity.since == TIMESTAMP
+
+
+async def test_status_flags_electrical_as_failing_when_any_of_its_three_fields_is_null() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "partial", null_reasons=[], power_factor=None)]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.sensors.electrical.status == "failing"
+
+
+async def test_status_forces_every_sensor_to_failing_when_overall_is_critical() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, "critical", null_reasons=[])]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "critical"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "failing"
+        assert capteur.since == TIMESTAMP
+
+
+async def test_status_treats_an_unknown_data_quality_as_critical() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures([FauxLecture("A", TIMESTAMP, None, null_reasons=[])]),  # type: ignore[arg-type]
+    )
+
+    etat = await service.status()
+
+    assert etat.sites[0].overall == "critical"
+
+
+async def test_status_ignores_an_unknown_null_reason() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [FauxLecture("A", TIMESTAMP, "good", null_reasons=["something_else"])]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "ok"
+    for capteur in (
+        site.sensors.consumption,
+        site.sensors.electrical,
+        site.sensors.temperature,
+        site.sensors.humidity,
+        site.sensors.network,
+    ):
+        assert capteur.status == "ok"
+
+
+async def test_status_flags_network_from_null_reasons_only() -> None:
+    service = SensorService(
+        sites=FauxDepotSites([FauxSite("A", "Site A")]),  # type: ignore[arg-type]
+        readings=FauxDepotLectures(  # type: ignore[arg-type]
+            [
+                FauxLecture(
+                    "A",
+                    TIMESTAMP,
+                    "partial",
+                    null_reasons=["network_loss"],
+                )
+            ]
+        ),
+    )
+
+    etat = await service.status()
+
+    site = etat.sites[0]
+    assert site.overall == "degraded"
+    assert site.sensors.network.status == "failing"
+    assert site.sensors.network.since == TIMESTAMP
+    assert site.sensors.consumption.status == "ok"
+    assert site.sensors.electrical.status == "ok"
+    assert site.sensors.temperature.status == "ok"
+    assert site.sensors.humidity.status == "ok"

docs/architecture/20-backend.md

@@ -12,10 +12,10 @@ Les quatre couches existent désormais, portées par l'authentification.
 
 ```mermaid
 flowchart TB
-  ep["endpoints<br/>health, auth, users, sites,<br/>recommendations, stats"]
+  ep["endpoints<br/>health, auth, users, sites, alerts,<br/>recommendations, stats, sensors"]
   sc["schemas<br/>Pydantic"]
-  sv["services<br/>AuthService, UserService,<br/>SiteService, RecommendationService,<br/>StatsService"]
+  sv["services<br/>AuthService, UserService,<br/>SiteService, AlertService, RecommendationService,<br/>StatsService, SensorService"]
-  rp["repositories<br/>user, refresh_token,<br/>login_attempt, audit_log,<br/>site, recommendation, reading"]
+  rp["repositories<br/>user, refresh_token,<br/>login_attempt, audit_log,<br/>site, alert, recommendation, reading"]
   md["models<br/>10 tables"]
   db[("PostgreSQL")]
 
@@ -146,6 +146,7 @@ Deux fichiers d'environnement, deux usages : `.env` à la racine alimente `docke
 | GET | `/api/v1/recommendations` | Liste les recommandations. `lecteur` | 401, 403, 500 |
 | GET | `/api/v1/recommendations/{recommendation_id}` | Décrit une recommandation. `lecteur` | 401, 403, 404, 422, 500 |
 | GET | `/api/v1/stats/summary` | Résume la consommation instantanée du parc. `lecteur` | 401, 403, 500 |
+| GET | `/api/v1/sensors/status` | État de santé des capteurs par site, dérivé de la dernière lecture. `admin` | 401, 403, 500 |
 | GET | `/metrics` | Format Prometheus, hors du schéma. Jeton requis si `APP_METRICS_TOKEN` est posé | |
 | GET | `/docs`, `/redoc`, `/openapi.json` | Hors du schéma. Fermés en `staging` et en `prod` | |
 
@@ -167,9 +168,10 @@ contrairement aux routes d'administration qui exigent `admin`. `SiteRepository`
 réelle. `GET /recommendations` et `GET /recommendations/{recommendation_id}` reprennent le même
 gabarit à la lettre, `recommendation_id` étant un entier plutôt qu'un texte. Une recommandation ne
 porte pas `site_id` : elle remonte à un site par sa seule `alert_id`, `alert` n'étant pas encore
-exposée. `GET /stats/summary` agrège deux repositories (`SiteRepository`, `ReadingRepository`)
+exposée. `GET /stats/summary` et `GET /sensors/status` agrègent chacune deux repositories
-dans un service dédié plutôt que d'exposer une table : elle n'entre donc pas dans ce gabarit
+(`SiteRepository`, `ReadingRepository`) dans un service dédié plutôt que d'exposer une table :
-route-par-table. Le contrat détaillé pour le frontend est dans
+elles n'entrent donc pas dans ce gabarit route-par-table. Le contrat détaillé pour le frontend est
+dans
 [31-contrat-authentification.md](31-contrat-authentification.md).
 
 ### `/health/ready`
@@ -246,8 +248,8 @@ Les modèles de `app/schemas/errors.py` décrivent ce que les gestionnaires renv
 
 ### Ajouter une route métier
 
-Checklist pour toute nouvelle route sur le gabarit `sites`/`alerts`/`recommendations`/`stats`
+Checklist pour toute nouvelle route sur le gabarit `sites`/`alerts`/`recommendations`/`stats`/
-(`reading`, `dataset`, `prediction`) :
+`sensors` (`reading`, `dataset`, `prediction`) :
 
 1. Composer ses `responses=` depuis `app/api/openapi.py` : `REPONSES_LECTEUR`/`REPONSES_ADMIN`
    au niveau de l'`include_router()` du routeur, `REPONSE_VALIDATION` et les codes locaux