{
  "schema_version": 1,
  "kind": "WEB_TOOL_CSV_CHANGE_APPROVAL_CASE",
  "change_id": "chg-001",
  "target": "delivery.csv",
  "old_revision": "rev1",
  "new_revision": "rev2",
  "delta": {"added_columns": ["region"], "changed_rows": ["001"], "newly_rejected_rows": ["002"]},
  "approval": {"status": "approved", "approver": "review@example.invalid", "approved_at": "2026-09-23T09:00:00+09:00", "reason": "region is required by rev2"},
  "source_evidence": "source-confirmation.csv",
  "input_sent_externally": false
}