refactor(api): standardize responses and restore media config contracts

app/schemas/__init__.py

@@ -1,4 +1,7 @@
 from .agent import *
+from .cache import *
+from .category import *
+from .common import *
 from .context import *
 from .dashboard import *
 from .download import *
@@ -6,13 +9,18 @@ from .event import *
 from .exception import *
 from .file import *
 from .history import *
+from .llm import *
 from .mediaserver import *
 from .message import *
+from .mfa import *
 from .music import *
 from .monitoring import *
+from .notification import *
 from .plugin import *
 from .response import *
 from .rule import *
+from .search import *
+from .storage import *
 from .openai import *
 from .servarr import *
 from .servcookie import *