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

backend/src/userbot/modules/jobs/handlers/enrich_chat.py

@@ -36,6 +36,8 @@ async def _save_user(ctx: CaptureContext, user: User) -> None:
 
 async def _enrich_chat_meta(client: Client, ctx: CaptureContext, chat_id: int) -> None:
     chat = await client.get_chat(chat_id)
+    if chat is None:
+        return
     photo = chat.photo
     photo_unique_id = photo.big_photo_unique_id if photo else None
     photo_file_id = photo.big_file_id if photo else None