fix: improve maintenance and synchronize live conversations

backend/tests/repo/test_knowledge_queue_repo.py

@@ -18,7 +18,6 @@ import pytest
 from app.repositories.knowledge_queue import KnowledgeQueueRepository
 from app.models.knowledge_queue import KnowledgeQueue, QueueStatus
 from app.models.user import User
-from uuid import uuid4
 
 @pytest.fixture
 def queue_repo(db):