fix: improve maintenance and synchronize live conversations

backend/tests/services/test_ticket_metering.py

@@ -22,9 +22,8 @@ from datetime import datetime, timedelta, timezone
 from types import SimpleNamespace
 from unittest.mock import patch
 
-import pytest
 
-from app.models.investigation import InvestigationRun, InvestigationRunType, InvestigationTrigger
+from app.models.investigation import InvestigationRun, InvestigationRunType
 from app.models.ticket import Ticket, TicketPriority, TicketSource, TicketStatus
 from app.models.ticket_activity import TicketActivity
 from app.repositories.ticket import InvestigationRepository