feat: 实现订单超时自动取消功能，支持钱包余额解冻和 Asynq Scheduler 统一调度

- 新增 expires_at 字段和复合索引，待支付订单 30 分钟超时自动取消
- 实现 cancelOrder/unfreezeWalletForCancel 钱包余额解冻逻辑
- 创建 Asynq 定时任务（order_expire/alert_check/data_cleanup）
- 将原有 time.Ticker 轮询迁移至 Asynq Scheduler 统一调度
- 同步 delta specs 到 main specs 并归档变更

internal/service/package_series/service.go

@@ -16,8 +16,8 @@ import (
 )
 
 type Service struct {
-	packageSeriesStore         *postgres.PackageSeriesStore
-	shopSeriesAllocationStore  *postgres.ShopSeriesAllocationStore
+	packageSeriesStore        *postgres.PackageSeriesStore
+	shopSeriesAllocationStore *postgres.ShopSeriesAllocationStore
 }
 
 func New(packageSeriesStore *postgres.PackageSeriesStore, shopSeriesAllocationStore *postgres.ShopSeriesAllocationStore) *Service {