Move Fail2Ban exceptions into central app.exceptions module

backend/app/routers/bans.py

@@ -23,7 +23,7 @@ from app.exceptions import JailNotFoundError, JailOperationError
 from app.models.ban import ActiveBanListResponse, BanRequest, UnbanAllResponse, UnbanRequest
 from app.models.jail import JailCommandResponse
 from app.services import jail_service
-from app.utils.fail2ban_client import Fail2BanConnectionError
+from app.exceptions import Fail2BanConnectionError
 
 router: APIRouter = APIRouter(prefix="/api/bans", tags=["Bans"])