Harden demo golden QA smoke

backend/tests/test_sprint21_demo_workflow_smoke.py

@@ -16,6 +16,9 @@ def test_demo_workflow_browser_smoke_script_checks_connected_v1_state() -> None:
     assert "/api/v1/projects/${project_id}/datasets/${candidate_dataset_id}/vector/summary" in script
     assert "GeoJSON Polygon/MultiPolygon geometry" in script
     assert "Candidate vector summary does not report persisted features" in script
+    assert "fixtures/golden/expected_qa_metrics.json" in script
+    assert "Seeded QA/QC score does not match the golden F1 baseline" in script
+    assert "QA/QC metric {key} drifted" in script
 
 
 def test_frontend_demo_action_loads_candidate_dataset_details_for_map_layer() -> None: