fix: improve maintenance and synchronize live conversations

backend/tests/repo/test_knowledge_repo.py

@@ -19,7 +19,6 @@ from app.repositories.knowledge import KnowledgeRepository
 from app.models.knowledge import Knowledge, SourceType
 from app.models.knowledge_to_agent import KnowledgeToAgent
 from app.models.agent import Agent, AgentType
-from uuid import uuid4
 
 @pytest.fixture
 def knowledge_repo(db):