feat: 归档旧迁移文件，创建初始化数据迁移和重置脚本

migrations/archive/000069_add_order_expiration.down.sql

@@ -0,0 +1,22 @@
+-- 回滚：删除订单过期时间索引和字段
+DO $$
+BEGIN
+    -- 删除复合索引
+    IF EXISTS (
+        SELECT 1 FROM pg_indexes
+        WHERE tablename='tb_order'
+        AND indexname='idx_order_expires'
+    ) THEN
+        DROP INDEX idx_order_expires;
+    END IF;
+
+    -- 删除 expires_at 字段
+    IF EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name='tb_order'
+        AND column_name='expires_at'
+    ) THEN
+        ALTER TABLE tb_order DROP COLUMN expires_at;
+    END IF;
+END
+$$;