Refactor backend services and utilities

- Update service layer implementations
- Improve configuration handling utilities
- Update documentation tasks

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

backend/app/services/action_config_service.py

@@ -65,8 +65,6 @@ async def _get_active_jail_names(socket_path: str) -> set[str]:
 # Constants
 # ---------------------------------------------------------------------------
 
-_SOCKET_TIMEOUT: float = 10.0
-
 # Allowlist pattern for action names used in path construction.
 _SAFE_ACTION_NAME_RE: re.Pattern[str] = re.compile(r"^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$")