Fix stable Statbel release identity

backend/tests/test_sprint228_statbel_release_management.py

@@ -340,6 +340,14 @@ def test_tampered_source_or_review_is_rejected(tmp_path: Path) -> None:
 def test_catalog_drift_and_outside_evidence_path_are_rejected(tmp_path: Path) -> None:
     args = arguments(tmp_path)
     original = decision(args)
+    checked_later = json.loads(json.dumps(original))
+    checked_later["catalog_identity"]["catalog_checked_at"] = "2026-07-19T01:00:00Z"
+
+    MANAGER.require_catalog_unchanged(
+        {"release": original["release"], "catalog_identity": original["catalog_identity"]},
+        checked_later,
+    )
+
     changed = json.loads(json.dumps(original))
     changed["catalog_identity"]["capabilities_sha256"] = "b" * 64