fix(userbot): a deletion that arrives before its message is applied once the message is stored

backend/src/userbot/handlers/deletes.py

@@ -20,6 +20,9 @@ async def on_deleted_messages(client: PyroClient, messages: list[Message]) -> No
             box.append(message.id)
         else:
             channels.setdefault(chat_id, []).append(message.id)
+    ctx.pending_deletes.remember(None, box)
+    for chat_id, ids in channels.items():
+        ctx.pending_deletes.remember(chat_id, ids)
     if box:
         await repository.mark_deleted_box(ctx.pool, ctx.account_id, box)
         await notify_bg_event(ctx.pool, "delete", ctx.account_id, message_ids=box)