refactor: complete Task 2/3 geo decouple + exceptions centralization; mark as done

backend/app/routers/config.py

@@ -93,12 +93,7 @@ from app.services.config_file_service import (
     JailNameError,
     JailNotFoundInConfigError,
 )
-from app.services.config_service import (
-    ConfigOperationError,
-    ConfigValidationError,
-    JailNotFoundError,
-)
-from app.services.jail_service import JailOperationError
+from app.exceptions import ConfigOperationError, ConfigValidationError, JailNotFoundError, JailOperationError
 from app.tasks.health_check import _run_probe
 from app.utils.fail2ban_client import Fail2BanConnectionError