fix: improve maintenance and synchronize live conversations

backend/app/repositories/jira.py

@@ -15,8 +15,7 @@ limitations under the License.
 """
 
 from sqlalchemy.orm import Session, joinedload
-from sqlalchemy import cast, String, func
-from typing import Optional, Dict, Any
+from typing import Optional
 from app.models.jira import AgentJiraConfig
 from app.models.agent import Agent
 from uuid import UUID