接口：https://api.mch.weixin.qq.com/v3/marketing/busifavor/stocks

入参：{"goods_name":"无","coupon_code_mode":"WECHATPAY_MODE","stock_name":"VIP银卡生日券","belong_merchant":"1611840819","stock_type":"NORMAL","coupon_use_rule":{"use_method":"OFF_LINE","coupon_available_time":{"available_begin_time":"2026-05-09T00:00:00+08:00","available_end_time":"2027-05-08T23:59:59+08:00","available_day_after_receive":30},"fixed_normal_coupon":{"discount_amount":10000,"transaction_minimum":10000}},"stock_send_rule":{"natural_person_limit":true,"prevent_api_abuse":true,"shareable":true,"max_coupons":10000,"max_coupons_per_user":1,"transferable":true},"out_request_no":"B576354C59284591B3BB145EAB292E4A","custom_entrance":{"code_display_mode":"QRCODE","appid":"wx53bb2b8700361220"},"display_pattern_info":{"merchant_logo_url":"https://wxpaylogo.qpic.cn/wxpaylogo/PiajxSqBRaEIPAeia7Imvtsjn4xZuMxUuSaJ8IckMj2Toeta2n1FniblA/0 ","merchant_name":"sakura.sou","background_color":"Color030"},"notify_config":{"notify_appid":"wx53bb2b8700361220"}}