curl -X PUT "https://scrape.st/backfill" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"id": "clxyz123abc"}'

{
  "status": "queued",
  "id": "clxyz123abc",
  "externalId": "12",
  "source": "x"
}

{
  "status": "conflict",
  "error": "A backfill is already in progress for this account.",
  "progress": {
    "cursor": "cm9abc123def456",
    "last_id": "1886493083207827456",
    "updated_at": "2026-04-22T01:00:00.000Z"
  }
}