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/services/plugin_service.py

@@ -118,7 +118,19 @@ class PluginService:
                 if plugin:
                     from app.services.entity_permission_service import register_entity_model
                     for entity_type, model_class in plugin.get_entity_models().items():
-                        register_entity_model(entity_type, model_class)
+                        register_entity_model(entity_type, model_class, plugin_name=name)
+
+                # Register field definitions for field-level permissions
+                # (audit: contribution type now fully lifecycle-integrated)
+                if plugin:
+                    field_defs = plugin.get_field_definitions()
+                    if field_defs:
+                        get_permission_registry().register_field_definitions(name, field_defs)
+
+                # Contract registry: clear inactive markers so contracts of
+                # a re-activated plugin are served again (audit P1).
+                from app.plugins.builtins.contracts import get_contract_registry
+                get_contract_registry().mark_plugin_active(name)
 
             if tenant_id and user_id:
                 await log_audit(
@@ -188,6 +200,15 @@ class PluginService:
                     for entity_type in plugin.get_entity_models():
                         unregister_entity_model(entity_type)
 
+                # Unregister field definitions (audit: full lifecycle)
+                get_permission_registry().unregister_field_definitions(name)
+
+                # Contract registry: fail closed for the deactivated plugin
+                # (ARCH-014 / audit P1 — central, so every plugin is covered
+                # even if its own on_deactivate forgets the unregister).
+                from app.plugins.builtins.contracts import get_contract_registry
+                get_contract_registry().unregister(name)
+
             if tenant_id and user_id:
                 await log_audit(
                     db,
@@ -225,6 +246,16 @@ class PluginService:
         Deactivates, calls on_uninstall hook, optionally drops tables, removes DB record.
         """
         try:
+            # Audit P1 (uninstall lifecycle): run the FULL service-level
+            # deactivation first. registry.uninstall()'s internal fallback
+            # (registry.deactivate) does NOT clean PermissionRegistry,
+            # _active_plugins or ENTITY_MODELS — an active plugin uninstalled
+            # directly through the registry left stale registrations behind.
+            pre = await self._registry._get_plugin_record(db, name)
+            if pre is not None and pre.active:
+                await self.deactivate_plugin(
+                    db, name, tenant_id=tenant_id, user_id=user_id
+                )
             record = await self._registry.uninstall(db, name, remove_data=remove_data)
             dropped_tables = getattr(record, "dropped_tables", [])
             if tenant_id and user_id:
@@ -305,9 +336,16 @@ class PluginService:
 
         return MANIFEST_SCHEMA_DOC.model_dump()
 
-    async def get_active_manifests(self, db: AsyncSession) -> list[dict[str, Any]]:
-        """Return UI manifests for all active plugins."""
-        return await self._registry.get_active_manifests(db)
+    async def get_active_manifests(
+        self, db: AsyncSession, tenant_id: uuid.UUID | None = None
+    ) -> list[dict[str, Any]]:
+        """Return UI manifests for all active plugins.
+
+        Audit P1 (tenant manifests): *tenant_id* filters out plugins that are
+        deactivated for the caller's tenant (tenant_plugin_activation),
+        mirroring require_active_plugin() so UI and backend agree.
+        """
+        return await self._registry.get_active_manifests(db, tenant_id=tenant_id)
 
 
 # Global service instance