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/model/dto/iot_card_dto.go

@@ -29,8 +29,8 @@ type StandaloneIotCardResponse struct {
 	IMSI                  string     `json:"imsi,omitempty" description:"IMSI"`
 	MSISDN                string     `json:"msisdn,omitempty" description:"卡接入号"`
 	BatchNo               string     `json:"batch_no,omitempty" description:"批次号"`
-	Supplier string `json:"supplier,omitempty" description:"供应商"`
-	Status   int    `json:"status" description:"状态 (1:在库, 2:已分销, 3:已激活, 4:已停用)"`
+	Supplier              string     `json:"supplier,omitempty" description:"供应商"`
+	Status                int        `json:"status" description:"状态 (1:在库, 2:已分销, 3:已激活, 4:已停用)"`
 	ShopID                *uint      `json:"shop_id,omitempty" description:"店铺ID"`
 	ShopName              string     `json:"shop_name,omitempty" description:"店铺名称"`
 	ActivatedAt           *time.Time `json:"activated_at,omitempty" description:"激活时间"`

internal/model/dto/order_dto.go

@@ -28,6 +28,7 @@ type OrderListRequest struct {
 	PurchaseRole  string     `json:"purchase_role" query:"purchase_role" validate:"omitempty,oneof=self_purchase purchased_by_parent purchased_by_platform purchase_for_subordinate" description:"订单角色 (self_purchase:自己购买, purchased_by_parent:上级代理购买, purchased_by_platform:平台代购, purchase_for_subordinate:给下级购买)"`
 	StartTime     *time.Time `json:"start_time" query:"start_time" description:"创建时间起始"`
 	EndTime       *time.Time `json:"end_time" query:"end_time" description:"创建时间结束"`
+	IsExpired     *bool      `json:"is_expired" query:"is_expired" description:"是否已过期 (true:已过期, false:未过期)"`
 }
 
 type PayOrderRequest struct {
@@ -44,21 +45,21 @@ type OrderItemResponse struct {
 }
 
 type OrderResponse struct {
-	ID                      uint                 `json:"id" description:"订单ID"`
-	OrderNo                 string               `json:"order_no" description:"订单号"`
-	OrderType               string               `json:"order_type" description:"订单类型 (single_card:单卡购买, device:设备购买)"`
-	BuyerType               string               `json:"buyer_type" description:"买家类型 (personal:个人客户, agent:代理商)"`
-	BuyerID                 uint                 `json:"buyer_id" description:"买家ID"`
-	IotCardID               *uint                `json:"iot_card_id,omitempty" description:"IoT卡ID"`
-	DeviceID                *uint                `json:"device_id,omitempty" description:"设备ID"`
-	TotalAmount             int64                `json:"total_amount" description:"订单总金额(分)"`
-	PaymentMethod           string               `json:"payment_method,omitempty" description:"支付方式 (wallet:钱包支付, wechat:微信支付, alipay:支付宝支付)"`
-	PaymentStatus           int                  `json:"payment_status" description:"支付状态 (1:待支付, 2:已支付, 3:已取消, 4:已退款)"`
-	PaymentStatusText       string               `json:"payment_status_text" description:"支付状态文本"`
-	PaidAt                  *time.Time           `json:"paid_at,omitempty" description:"支付时间"`
-	IsPurchaseOnBehalf      bool                 `json:"is_purchase_on_behalf" description:"是否为代购订单"`
-	CommissionStatus        int                  `json:"commission_status" description:"佣金状态 (1:待计算, 2:已计算)"`
-	CommissionConfigVersion int                  `json:"commission_config_version" description:"佣金配置版本"`
+	ID                      uint       `json:"id" description:"订单ID"`
+	OrderNo                 string     `json:"order_no" description:"订单号"`
+	OrderType               string     `json:"order_type" description:"订单类型 (single_card:单卡购买, device:设备购买)"`
+	BuyerType               string     `json:"buyer_type" description:"买家类型 (personal:个人客户, agent:代理商)"`
+	BuyerID                 uint       `json:"buyer_id" description:"买家ID"`
+	IotCardID               *uint      `json:"iot_card_id,omitempty" description:"IoT卡ID"`
+	DeviceID                *uint      `json:"device_id,omitempty" description:"设备ID"`
+	TotalAmount             int64      `json:"total_amount" description:"订单总金额(分)"`
+	PaymentMethod           string     `json:"payment_method,omitempty" description:"支付方式 (wallet:钱包支付, wechat:微信支付, alipay:支付宝支付)"`
+	PaymentStatus           int        `json:"payment_status" description:"支付状态 (1:待支付, 2:已支付, 3:已取消, 4:已退款)"`
+	PaymentStatusText       string     `json:"payment_status_text" description:"支付状态文本"`
+	PaidAt                  *time.Time `json:"paid_at,omitempty" description:"支付时间"`
+	IsPurchaseOnBehalf      bool       `json:"is_purchase_on_behalf" description:"是否为代购订单"`
+	CommissionStatus        int        `json:"commission_status" description:"佣金状态 (1:待计算, 2:已计算)"`
+	CommissionConfigVersion int        `json:"commission_config_version" description:"佣金配置版本"`
 
 	// 操作者信息
 	OperatorID       *uint  `json:"operator_id,omitempty" description:"操作者ID"`
@@ -74,6 +75,10 @@ type OrderResponse struct {
 	Items     []*OrderItemResponse `json:"items" description:"订单明细列表"`
 	CreatedAt time.Time            `json:"created_at" description:"创建时间"`
 	UpdatedAt time.Time            `json:"updated_at" description:"更新时间"`
+
+	// 订单超时信息
+	ExpiresAt *time.Time `json:"expires_at,omitempty" description:"订单过期时间"`
+	IsExpired bool       `json:"is_expired" description:"是否已过期"`
 }
 
 type OrderListResponse struct {