fix(backend): userbot follows kurigram 2.2.26, user and chat parsing is awaited, missing chat is handled

backend/src/userbot/handlers/raw/dispatcher.py

@@ -38,4 +38,4 @@ async def dispatch(
         await handler(client, update, users, chats)
 
 
-handlers = dispatch.handlers
+handlers = dispatch.handlers  # ty: ignore[unresolved-attribute]