Move Fail2Ban exceptions into central app.exceptions module

backend/app/routers/config_misc.py

@@ -20,7 +20,7 @@ from app.models.config import (
     ServiceStatusResponse,
 )
 from app.services import config_file_service, config_service, jail_service, log_service, setup_service
-from app.utils.fail2ban_client import Fail2BanConnectionError
+from app.exceptions import Fail2BanConnectionError
 
 log: structlog.stdlib.BoundLogger = structlog.get_logger()