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

backend/src/userbot/handlers/deletes.py

@@ -30,4 +30,4 @@ async def on_deleted_messages(client: PyroClient, messages: list[Message]) -> No
         )
 
 
-handlers = on_deleted_messages.handlers
+handlers = on_deleted_messages.handlers  # ty: ignore[unresolved-attribute]