fix i18n middleware

src/quickbot/middleware/telegram/i18n.py

@@ -17,7 +17,7 @@ class I18nMiddleware(SimpleI18nMiddleware):
 
     async def get_locale(self, event: TelegramObject, data: Dict[str, Any]) -> str:
         db_session = data.get("db_session")
-        if db_session and event.model_fields.get("from_user"):
+        if db_session and event.__dict__.get("from_user"):
             user = await self.user_class.get(id=event.from_user.id, session=db_session)
             if user and user.lang:
                 return user.lang.value