fix: 修复禁用所有轮询配置重启后再启用无法工作的问题

- 新增 RedisPollingConfigChangedChannel 常量，用于跨进程配置变更通知
- ConfigService 注入 Redis，Create/Delete/UpdateStatus 后发布 Pub/Sub 事件
- PollingConfigManager 新增 WatchChanges() 方法，收到通知立即刷新内存缓存
- PollingInitializer 新增 Restart() 方法，支持初始化完成后安全重启（CAS 防并发）
- Worker 订阅配置变更事件，configs 从空变为非空时触发 Initializer.Restart()

根因：启动时所有配置禁用导致分片队列为空，Initializer 是一次性的，
之后启用配置只更新 DB 但不重建队列，调度器无卡可处理

internal/bootstrap/services.go

@@ -206,7 +206,7 @@ func initServices(s *stores, deps *Dependencies) *services {
 		Order:                      orderSvc.New(deps.DB, deps.Redis, s.Order, s.OrderItem, s.AgentWallet, s.AssetWallet, s.Payment, purchaseValidation, s.ShopPackageAllocation, s.ShopSeriesAllocation, s.IotCard, s.Device, s.PackageSeries, s.PackageUsage, s.Package, wechatConfig, deps.WechatPayment, paymentLoader, deps.QueueClient, deps.Logger, s.AssetIdentifier, s.PersonalCustomer, s.PersonalCustomerPhone),
 		Exchange:                   exchangeSvc.New(deps.DB, s.ExchangeOrder, s.IotCard, s.Device, s.AssetWallet, s.AssetWalletTransaction, s.PackageUsage, s.PackageUsageDailyRecord, s.ResourceTag, s.PersonalCustomerDevice, deps.Logger),
 		Recharge:                   rechargeSvc.New(deps.DB, s.AssetWallet, s.AssetWalletTransaction, s.IotCard, s.Device, s.ShopSeriesAllocation, s.PackageSeries, s.CommissionRecord, wechatConfig, paymentLoader, deps.Logger),
-		PollingConfig:              pollingSvc.NewConfigService(s.PollingConfig),
+		PollingConfig:              pollingSvc.NewConfigService(s.PollingConfig, deps.Redis, deps.Logger),
 		PollingConcurrency:         pollingSvc.NewConcurrencyService(s.PollingConcurrencyConfig, deps.Redis),
 		PollingMonitoring:          pollingSvc.NewMonitoringService(deps.Redis),
 		PollingAlert:               pollingSvc.NewAlertService(s.PollingAlertRule, s.PollingAlertHistory, deps.Redis, deps.Logger),