feat(provenance): govern source snapshots and data inputs

backend/tests/test_accuracy_phase2_foundation_audit.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+SCRIPT = ROOT / "scripts" / "run_accuracy_phase2_foundation_audit.py"
+SPEC = importlib.util.spec_from_file_location("accuracy_phase2_foundation_audit", SCRIPT)
+assert SPEC is not None and SPEC.loader is not None
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_phase2_foundation_audit_enumerates_exact_source_and_contract_policies() -> None:
+    payload = MODULE.collect()
+
+    assert payload["phase"] == "P2"
+    assert payload["migration_revision"] == "202608010001"
+    assert payload["source_registry"]["definition_count"] >= 40
+    assert payload["source_registry"]["required_building_policy"] == {
+        "grb_primary_building_validation": "primary",
+        "buildings_register_classification": "authoritative",
+        "sentinel_2_classification": "contextual",
+        "dhmv_classification": "authoritative",
+        "osm_ground_truth_allowed": False,
+    }
+    assert {(item["key"], item["version"]) for item in payload["data_contracts"]} == {
+        ("geointel.vector.geojson", "1.0.0"),
+        ("geointel.raster.geotiff", "1.0.0"),
+        ("geointel.label.yolo", "1.0.0"),
+        ("geointel.label.yolo", "1.1.0"),
+        ("geointel.model.pytorch", "1.0.0"),
+    }