fix: improve maintenance and synchronize live conversations

backend/app/repositories/mcp_tool.py

@@ -17,7 +17,7 @@ limitations under the License.
 from sqlalchemy.orm import Session, joinedload
 from typing import List, Optional
 from app.models.agent import Agent
-from app.models.mcp_tool import MCPTool, MCPToolToAgent, MCPTransportType
+from app.models.mcp_tool import MCPTool, MCPToolToAgent
 from app.models.ticket_settings import OrganizationTicketSettings
 from uuid import UUID
 from app.core.logger import get_logger