test(tradein): patch _geoportal_house_match in cadastral-before-yandex test

The new geoportal house-match tier runs first in geocode(); this legacy
cadastral test must mock it to None so it still exercises the cadastral
forward path (otherwise the MagicMock db row leaks through the new tier).

tradein-mvp/backend/tests/services/test_cadastral_reverse.py

@@ -353,6 +353,8 @@ async def test_geocode_uses_cadastral_before_yandex() -> None:
 
     with (
         patch("app.services.geocoder._cache_get", return_value=None),
+        # geoportal house-match (new primary local tier) misses → cadastral path exercised
+        patch("app.services.geocoder._geoportal_house_match", return_value=None),
         # anchored house-match (new primary cadastral step) misses → legacy forward used
         patch("app.services.geocoder._cadastral_house_match", return_value=None),
         patch(