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

backend/app/services/config_service.py

@@ -44,6 +44,7 @@ from app.models.config import (
     RegexTestResponse,
     ServiceStatusResponse,
 )
+from app.exceptions import ConfigOperationError, ConfigValidationError, JailNotFoundError
 from app.services import setup_service
 from app.utils.fail2ban_client import Fail2BanClient
 
@@ -55,26 +56,7 @@ _SOCKET_TIMEOUT: float = 10.0
 # Custom exceptions
 # ---------------------------------------------------------------------------
 
-
-class JailNotFoundError(Exception):
-    """Raised when a requested jail name does not exist in fail2ban."""
-
-    def __init__(self, name: str) -> None:
-        """Initialise with the jail name that was not found.
-
-        Args:
-            name: The jail name that could not be located.
-        """
-        self.name: str = name
-        super().__init__(f"Jail not found: {name!r}")
-
-
-class ConfigValidationError(Exception):
-    """Raised when a configuration value fails validation before writing."""
-
-
-class ConfigOperationError(Exception):
-    """Raised when a configuration write command fails."""
+# (exceptions are now defined in app.exceptions and imported above)
 
 
 # ---------------------------------------------------------------------------