Refactor map color threshold storage into dedicated settings service

backend/app/services/protocols.py

@@ -284,21 +284,6 @@ class ConfigService(Protocol):
     ) -> None:
         ...
 
-    async def read_fail2ban_log(
-        self,
-        socket_path: str,
-        lines: int,
-        filter_text: str | None = None,
-    ) -> Fail2BanLogResponse:
-        ...
-
-    async def get_service_status(
-        self,
-        socket_path: str,
-        probe_fn: Callable[[str], Awaitable[ServiceStatusResponse]] | None = None,
-    ) -> ServiceStatusResponse:
-        ...
-
 
 @runtime_checkable
 class HistoryService(Protocol):