fix: retain WALOUS edition warnings

backend/tests/test_walous_land_cover_service.py

@@ -499,7 +499,11 @@ def test_walous_temporal_comparison_reuses_persisted_raster_metrics(
                     }
                 ],
             },
-            "limitation_message": "Cell-based estimate.",
+            "limitation_message": (
+                "2018 crosswalk and methodology limitation."
+                if dataset_id == earlier.id
+                else "2023 edition accuracy limitation."
+            ),
         }
 
     monkeypatch.setattr(WalousLandCoverService, "analyze", analyze)
@@ -523,6 +527,8 @@ def test_walous_temporal_comparison_reuses_persisted_raster_metrics(
     assert result.metric.later_value == 5.5
     assert result.metric.absolute_change == 1.5
     assert result.object_changes.available is False
+    assert "2018 crosswalk and methodology limitation." in result.warnings
+    assert "2023 edition accuracy limitation." in result.warnings
 
 
 def test_walous_api_routes_use_canonical_envelopes(monkeypatch) -> None: