{
  "observations": [
    {
      "product_id": "refill-500",
      "variant": "unscented-500ml",
      "market": "US",
      "currency": "USD",
      "observed_at": "2026-11-03T14:00:00Z",
      "displayed_price": 20,
      "collection_status": "success"
    },
    {
      "product_id": "refill-500",
      "variant": "unscented-500ml",
      "market": "US",
      "currency": "USD",
      "observed_at": "2026-11-10T14:00:00Z",
      "displayed_price": 18,
      "collection_status": "success"
    },
    {
      "product_id": "bottle-750",
      "variant": "blue-750ml",
      "market": "US",
      "currency": "USD",
      "observed_at": "2026-11-03T14:00:00Z",
      "displayed_price": 32,
      "collection_status": "success"
    },
    {
      "product_id": "bottle-750",
      "variant": "blue-750ml",
      "market": "US",
      "currency": "USD",
      "observed_at": "2026-11-10T14:00:00Z",
      "displayed_price": null,
      "collection_status": "fetch_failed"
    }
  ],
  "worked_comparisons": [
    {
      "product_id": "refill-500",
      "absolute_change": -2,
      "percentage_change": -10,
      "comparable": true
    },
    {
      "product_id": "bottle-750",
      "absolute_change": null,
      "percentage_change": null,
      "comparable": false,
      "note": "A failed fetch is a collection issue. Keep the last successful price of 32; do not report a drop to zero."
    }
  ]
}