Refactor map color threshold storage into dedicated settings service

backend/tests/test_regression_500s.py

@@ -227,7 +227,7 @@ class TestServiceStatusBanguiVersion:
     async def test_online_response_contains_bangui_version(self) -> None:
         """The returned model must contain the ``bangui_version`` field."""
         from app.models.server import ServerStatus
-        from app.services import config_service
+        from app.services import health_service
         import app
 
         online_status = ServerStatus(
@@ -250,8 +250,8 @@ class TestServiceStatusBanguiVersion:
             def __init__(self, **_kw: Any) -> None:
                 self.send = AsyncMock(side_effect=_send)
 
-        with patch("app.services.config_service.Fail2BanClient", _FakeClient):
-            result = await config_service.get_service_status(
+        with patch("app.services.health_service.Fail2BanClient", _FakeClient):
+            result = await health_service.get_service_status(
                 "/fake/socket",
                 probe_fn=AsyncMock(return_value=online_status),
             )
@@ -263,12 +263,12 @@ class TestServiceStatusBanguiVersion:
     async def test_offline_response_contains_bangui_version(self) -> None:
         """Even when fail2ban is offline, ``bangui_version`` must be present."""
         from app.models.server import ServerStatus
-        from app.services import config_service
+        from app.services import health_service
         import app
 
         offline_status = ServerStatus(online=False)
 
-        result = await config_service.get_service_status(
+        result = await health_service.get_service_status(
             "/fake/socket",
             probe_fn=AsyncMock(return_value=offline_status),
         )