TASK:买家端/卖家端接入支付服务

src/main/resources/db/schema.sql

@@ -18,6 +18,9 @@ CREATE TABLE seller_listing (
     INDEX idx_deleted (deleted)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='商品表';
 
+ALTER TABLE seller_listing
+    ADD COLUMN sales_volume INT DEFAULT 0 COMMENT '销量';
+
 -- 商品图片表
 CREATE TABLE seller_listing_image (
     id              BIGINT PRIMARY KEY COMMENT '图片ID',
@@ -93,3 +96,7 @@ CREATE TABLE seller_order_item (
     INDEX idx_listing_id (listing_id),
     INDEX idx_deleted (deleted)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='订单商品明细表';
+
+-- 新增 payment_id 字段
+ALTER TABLE seller_orders
+    ADD COLUMN payment_id VARCHAR(64) DEFAULT NULL COMMENT '交易流水号（关联支付表）';