{
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      "bytes": 4626351,
      "sha256": "1187dbe72544b696e64c0c61af14a7db2e60d5ae870b9cd56bacc07e0661001a",
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      "last_observed_jst": "2026-10-14T15:30:59.284"
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      "bytes": 3437467,
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      "last_observed_jst": "2026-10-14T11:35:05.620"
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      "last_observed_jst": "2026-10-14T15:30:59.530"
    }
  ],
  "method": "PUSH/REST_BOARDのみ。価格・累積出来高・API VWAP・最良気配を抽出。認証・個人注文のレコードを含めない。板の数量を約定出来高・DELTAへ加算しない。",
  "sanitized_files": [
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      "local_path": "[local path omitted]",
      "sha256": "3def27ecdd0921508a314a62f2826a27e4776530a4f71a46bf37b0a8ad1edc70",
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    "285A": {
      "source": "HDD BoardReadTools",
      "files": [
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        "285A_20261014_122506.jsonl.gz"
      ],
      "market_records": 116176,
      "display_snapshots": 1357,
      "first_observed_jst": "2026-10-14T09:02:18.625+09:00",
      "last_observed_jst": "2026-10-14T15:30:59.284+09:00",
      "first_cumulative_volume": 2520400.0,
      "last_cumulative_volume": 53857300.0,
      "walk_full_day_volume": 53857300,
      "volume_difference": 0.0,
      "stale_lower_volume_records_skipped": 2,
      "sampling": "表示用は15秒区間で最後に観測した板を保持。観測時刻が再生時刻以下のスナップショットだけを表示。寄り09:00〜09:02頃は板ログ未収録、出来高は歩み値で補う。"
    },
    "6857": {
      "source": "HDD BoardReadTools",
      "files": [
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        "6857_20261014_122506.jsonl.gz"
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      "market_records": 88750,
      "display_snapshots": 1357,
      "first_observed_jst": "2026-10-14T09:02:18.690+09:00",
      "last_observed_jst": "2026-10-14T15:30:59.530+09:00",
      "first_cumulative_volume": 975900.0,
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      "walk_full_day_volume": 16637800,
      "volume_difference": 0.0,
      "stale_lower_volume_records_skipped": 0,
      "sampling": "表示用は15秒区間で最後に観測した板を保持。観測時刻が再生時刻以下のスナップショットだけを表示。寄り09:00〜09:02頃は板ログ未収録、出来高は歩み値で補う。"
    }
  }
}