Persist QA feature evidence

backend/tests/test_sprint111_qa_feature_evidence.py

@@ -0,0 +1,39 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def read_text(relative_path: str) -> str:
+    return (ROOT / relative_path).read_text(encoding="utf-8")
+
+
+def test_qa_feature_evidence_contract_is_documented_and_rendered() -> None:
+    schema = read_text("backend/app/schemas/qa.py")
+    quality_panel = read_text("frontend/src/components/quality/QualityResultsPanel.tsx")
+    api_contracts = read_text("docs/API_CONTRACTS.md")
+
+    for field_name in ("match_evidence", "false_positive_evidence", "false_negative_evidence"):
+        assert field_name in schema
+        assert field_name in quality_panel
+        assert field_name in api_contracts
+
+    assert "Feature-level QA/QC evidence" in quality_panel
+    assert "Matched feature ids" in quality_panel
+    assert "False positive feature ids" in quality_panel
+    assert "False negative feature ids" in quality_panel
+    assert "evidenceLabel" in quality_panel
+
+
+def test_qa_services_persist_feature_evidence_without_new_migrations() -> None:
+    qa_route = read_text("backend/app/api/routes/qa.py")
+    detection_service = read_text("backend/app/services/detection_service.py")
+    segmentation_service = read_text("backend/app/services/segmentation_service.py")
+    migrations = "\n".join(path.name for path in (ROOT / "backend" / "alembic" / "versions").glob("*.py"))
+
+    for field_name in ("match_evidence", "false_positive_evidence", "false_negative_evidence"):
+        assert field_name in qa_route
+        assert field_name in detection_service
+        assert field_name in segmentation_service
+
+    assert "quality_check_items" not in migrations