{
  "version": "v1.1",
  "updated_at": "2026-04-12",
  "changes": [
    "修复3条零价格记录（原数据已无零价格，可能之前已修复）",
    "标准化date字段为datetime",
    "数据清洗完成，无NaN/负值"
  ],
  "stats": {
    "cn_full_history": {
      "rows": 8482964,
      "stocks": 4987,
      "date_range": "2018-01-02 ~ 2026-04-10"
    }
  }
}