fix(arch): externes Audit — 13 Backend-Fixes (Workspace-Modules, Tenant-Manifeste, Lifecycle, Contracts, Permissions)

Verifikation: Alle 17 Audit-Findings gegen den Code geprueft — alle bestaetigt.
Backend-Lifecycle-Fixes umgesetzt; 4 Frontend-Plugin-Architektur-Punkte
als Phase Q in die Roadmap eingeplant.

- P1 list_workspaces: Module + User-Counts gebuendelt laden (Editor-Overwrite-Bug)
- P1 active-manifests: Tenant-Deaktivierung (tenant_plugin_activation) filtern
- P1 uninstall: volle Service-Deactivation VOR registry.uninstall()
- P1 ContractRegistry: DB-Aktivstatus-Guard (Restart-Edge-Case) + Re-Activate
- P1/P2 Field-Definitions: voller Lifecycle (register/unregister) im Service
- P1/P2 Contact-Felddefinitionen (39) ins ContactsPlugin-Manifest verschoben
- P1 12 fehlende Permission-Keys registriert (AST-Scan: 0 fehlend)
- P2 contact_folder -> ContactsPlugin; ENTITY_PLUGIN_OWNERS wird befuellt
- P2 Entity-Permission-Fallback fail-closed statt contacts:read
- P2 forgejo_error_reporter is_core=False; DMS is_core=True (ADR-020)
- P2 Worker: Contacts-Trash-Cleanup ins Plugin (get_job_modules-Discovery)
- P1/P2 DSGVO-Export delegiert an DSAR-Collector (kein Core->Contacts)
- P2 False-green Tests korrigiert (or True, veraltete Route-Count-Assertion)

Verifikation: tests/test_audit_architecture_fixes.py 17/17; Regressionen
gruen (contacts_lifecycle, entity_registry, workspace_scopes, rbac,
lifecycle_service); Combo-Order-Test 35/35; Cross-Plugin-Checker 497/0;
compileall sauber; ruff auf 7-Error-Baseline.

Doku: PROGRESS.md Audit-Section, PLATFORM_ROADMAP.md Phase Q (Q1-Q4),
plugin-development-guide.md Lifecycle, permissions.md Katalog.

app/core/sensitive_data.py

@@ -173,12 +173,15 @@ def _derive_policy_from_sensitivity(
     if field_name in entity_policy:
         return dict(entity_policy[field_name])
 
-    # Try to get sensitivity from permission registry (lazy import to avoid
-    # circular dependencies at module load time).
+    # Try to get sensitivity from the permission registry (lazy import to
+    # avoid circular dependencies at module load time). Use the registry's
+    # combined view (core + plugin field definitions) — contact fields moved
+    # to the ContactsPlugin manifest (audit P1/P2), so CORE_FIELD_DEFINITIONS
+    # alone no longer covers them.
     try:
-        from app.core.permission_registry import CORE_FIELD_DEFINITIONS
+        from app.core.permission_registry import get_permission_registry
 
-        for fd in CORE_FIELD_DEFINITIONS:
+        for fd in get_permission_registry().get_all_field_definitions():
             if fd.get("module") == entity_type and fd.get("field") == field_name:
                 sensitivity = fd.get("sensitivity", "normal")
                 return dict(_SENSITIVITY_DEFAULTS.get(sensitivity, _ALL_ALLOWED))