{
  "date": "2026-10-12",
  "block": "12.5.173",
  "newFrontend": "ux-ping173",
  "oldBackend": "ux-history172",
  "readerAccepted": true,
  "probeCount": 0,
  "bound": "Actual empty configured catalog; nonempty old valid payloads separately covered by unit/UI fixtures"
}