fix: complete all 15 audit points — delegations entparkt, unbenutzte API-Clients gelöscht, conftest.py erweitert (wiki+plugin models), decision_guard↔Approval integriert, Frontend-Pages API-Anbindung (AgentsOverview, StartPage), tsc clean, 11 tests passing

tests/conftest.py

@@ -70,6 +70,16 @@ for _plugin_name in _registry.list_discovered():
             importlib.import_module(f"app.plugins.builtins.{_plugin_name}")
         except Exception:
             pass
+        # Also directly import models.py to ensure all tables are registered
+        try:
+            importlib.import_module(f"app.plugins.builtins.{_plugin_name}.models")
+        except Exception:
+            pass
+
+# Also import core models that may be missing
+from app.models.plugin_allowlist import PluginAllowlist  # noqa: F401
+# Wiki plugin models — not loaded by get_entity_models()
+from app.plugins.builtins.wiki.models import WikiArticle, WikiArticleVersion, WikiCategory  # noqa: F401
 
 from app.plugins.registry import reset_registry_for_testing  # noqa: F401
 from app.core.permission_registry import init_permission_registry  # noqa: F401