Move Fail2Ban exceptions into central app.exceptions module

backend/app/utils/fail2ban_client.py

@@ -27,6 +27,8 @@ from typing import TYPE_CHECKING, Protocol
 
 import structlog
 
+from app.exceptions import Fail2BanConnectionError, Fail2BanProtocolError
+
 # ---------------------------------------------------------------------------
 # Types
 # ---------------------------------------------------------------------------
@@ -125,23 +127,6 @@ _RETRY_INITIAL_BACKOFF: float = 0.15  # seconds; doubles on each attempt
 _COMMAND_SEMAPHORE_CONCURRENCY: int = 10
 
 
-class Fail2BanConnectionError(Exception):
-    """Raised when the fail2ban socket is unreachable or returns an error."""
-
-    def __init__(self, message: str, socket_path: str) -> None:
-        """Initialise with a human-readable message and the socket path.
-
-        Args:
-            message: Description of the connection problem.
-            socket_path: The fail2ban socket path that was targeted.
-        """
-        self.socket_path: str = socket_path
-        super().__init__(f"{message} (socket: {socket_path})")
-
-
-class Fail2BanProtocolError(Exception):
-    """Raised when the response from fail2ban cannot be parsed."""
-
 
 def _send_command_sync(
     socket_path: str,