feat(vscode): statut git détaillé, sessions archivées, lien IDE web, fetch/pull (0.2.0)

Reflète la refonte IDE en supervision légère, sans dupliquer l'éditeur :
- statut git fin dans l'arbre (staged/unstaged/conflits + dernier commit) ;
- commande « Open Worktree IDE » → deep-link /workspace/:repoId/:wt ;
- commandes fetch / pull (ff-only|rebase) sur les worktrees ;
- event WS session_archived + réglage showArchivedSessions (badge + filtre).
README/CHANGELOG + tests (config/rest-client/ws-client).

packages/vscode/CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## 0.2.0
+
+Follows the daemon's "worktree IDE" milestone (P7→P12), while keeping the extension a lightweight
+**visual worktree manager** — no editor/diff duplicated here, that lives in the web IDE:
+
+- **Detailed git status** in the worktree tree: staged / unstaged / conflict counts and the last commit
+  subject (from the daemon's enriched `WorktreeGitStatus`).
+- **Open Worktree IDE** command — deep-links to the web `/workspace/:repoId/:wt` view.
+- **Fetch** and **Pull** (fast-forward only or rebase) commands on worktrees, alongside commit/push.
+- **Archived sessions**: the `session_archived` event is handled live; finished, auto-archived sessions
+  are badged and hidden by default, with a new `arboretum.showArchivedSessions` setting to reveal them.
+
 ## 0.1.0
 
 Initial release — native VS Code integration for the Arboretum daemon: