-- 订单表新增退款原因列
-- 执行: mysql -u user -p db < soul-api/scripts/add-order-refund-reason.sql

-- 若列已存在（如由 GORM AutoMigrate 创建）会报错，可忽略
ALTER TABLE orders ADD COLUMN refund_reason VARCHAR(500) DEFAULT NULL COMMENT '退款原因' AFTER referrer_id;