平台原始字段（来自 API 响应或 CSV 导入）：
{
"add_time": "2024-01-04 11:00:39",
"barcode": "",
"biz_type": 1,
"cates": [
{
"cate_id": 151452900,
"cate_name": "文创",
"sort_num": 16
}
],
"chain_store_sync": false,
"cost_price": "",
"fx": 0,
"fx_fee_rate": "0.0",
"h5Url": "https://weidian.com/item.html?itemID=7099702598",
"imgs": [
"https://si.geilicdn.com/pcitem1790250396-67d30000018cd2648ab80a813470_1124_1124.jpg?w=480&h=480&cp=1"
],
"istop": 0,
"item_desc": "【漫农好物】龙年环保手提袋|无纺布",
"item_name": "【漫农好物】龙年环保手提袋|无纺布",
"item_simple_name": "环保手提袋",
"itemid": "7099702598",
"merchant_code": "",
"price": "19.90",
"self_create": true,
"seller_id": "1867168977",
"skus": [],
"sold": 0,
"status": 2,
"stock": 100,
"thumb_imgs": [
"https://si.geilicdn.com/pcitem1790250396-67d30000018cd2648ab80a813470_1124_1124.jpg?w=110&h=110&cp=1"
],
"tiaohuo_item": false,
"update_time": "2024-10-15 20:20:03"
}