feat(v2): outbox 退款感知(refund_id 进唯一键)+ 投递门禁放行退款态 + Enqueue 贯通 refundID

main.go

@@ -41,11 +41,11 @@ func main() {
 	orderStore := store.NewOrderStore(db)
 	webhookStore := store.NewWebhookStore(db)
 	notifier := webhook.NewNotifier(webhookStore, config.C.BizByName, func(no string) (bool, error) {
-		o, err := orderStore.GetOrder(no) // 投递门禁:订单已付才发(enqueue-before-flip 不变量)
+		o, err := orderStore.GetOrder(no) // 投递门禁:订单已结算(paid 及退款态)才放行
 		if err != nil {
 			return false, err
 		}
-		return o.Status == model.OrderPaidV2, nil
+		return o.Status.Settled(), nil
 	})
 	notifier.Start(60 * time.Second)
 	productResolver := gateway.NewDBProductResolver(db) // 币种由下单渠道结算能力驱动(设计 §4.1)