修复逻辑问题

scripts/sql/init.sql

@@ -761,6 +761,7 @@ create table product_sku (
     price       decimal not null,
     price_min   decimal not null,
     status      int     not null default 1,
+    sort        int not null default 0,
     created_at  timestamptz default current_timestamp,
     updated_at  timestamptz default current_timestamp,
     deleted_at  timestamptz
@@ -778,6 +779,7 @@ comment on column product_sku.code is 'SKU 代码：格式为 key=value,key=valu
 comment on column product_sku.name is 'SKU 可读名称';
 comment on column product_sku.price_min is '最低价格';
 comment on column product_sku.status is 'SKU状态：0-禁用，1-正常';
+comment on column product_sku.sort is '排序';
 comment on column product_sku.created_at is '创建时间';
 comment on column product_sku.updated_at is '更新时间';
 comment on column product_sku.deleted_at is '删除时间';