fix imports

aggregator/models.py

@@ -7,8 +7,6 @@ from django.conf import settings
 from django.db import models
 from pyrogram import Chat as PyrogramChat, Message as PyrogramMessage
 
-from aggregator.tasks import collect_new_messages
-
 
 class AggregationSource(models.Model):
     owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
@@ -28,6 +26,8 @@ class Chat(models.Model):
 
     @classmethod
     def from_obj(cls, chat: PyrogramChat, client):
+        from aggregator.tasks import collect_new_messages
+
         obj, created = Chat.objects.update_or_create(
             chat_id=chat.id,
             defaults={