refactor: Remove unused HTTPException imports from routers

After removing all try/except blocks that used HTTPException for domain
exception conversion, these imports are no longer needed in the routers.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

backend/app/routers/jail_config.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Annotated
 
-from fastapi import APIRouter, HTTPException, Path, Query, Request, status
+from fastapi import APIRouter, Path, Query, Request, status
 
 from app.dependencies import (
     AppDep,
@@ -12,21 +12,6 @@ from app.dependencies import (
     Fail2BanStartCommandDep,
     PendingRecoveryDep,
 )
-from app.exceptions import (
-    ActionNameError,
-    ActionNotFoundError,
-    ConfigOperationError,
-    ConfigValidationError,
-    ConfigWriteError,
-    Fail2BanConnectionError,
-    FilterNameError,
-    FilterNotFoundError,
-    JailAlreadyActiveError,
-    JailAlreadyInactiveError,
-    JailNameError,
-    JailNotFoundError,
-    JailNotFoundInConfigError,
-)
 from app.models.config import (
     ActivateJailRequest,
     AddLogPathRequest,