file structure and comments unified

backend/src/shared_objects.py

@@ -1,8 +1,8 @@
-from typing import Optional
-import asyncio
+"""Shared runtime objects initialized during FastAPI startup."""
 
-# These are filled at FastAPI startup
-# DB instance
-db = None
+import asyncio
+from typing import Any, Optional
+
+db: Any = None
 web_loop: Optional[asyncio.AbstractEventLoop] = None
-broadcaster = None
+broadcaster: Any = None