Update user_id for bigint and update secure

bot/modules/access_control/auth.py

@@ -48,9 +48,10 @@ async def is_authorized(user_id: int) -> bool:
     # If private mode is disabled
     # Check whitelist (if configured)
     if settings.authorized_users_list:
-        return user_id in settings.authorized_users_list
+        if user_id in settings.authorized_users_list:
+            return True
     
-    # If whitelist is not configured, check in database
+    # Check in database (users added via /adduser should have access)
     async with AsyncSessionLocal() as session:
         user = await session.get(User, user_id)
         # If user exists in database and is not blocked - allow access