fix: proper DeliveryStatus mapping + cancel delivery on failed payment

- Added MapDeliveryStatus() to correctly map Domain→Proto enum values
- Domain Pending(1) was incorrectly cast to Proto PROCESSING(1) instead of PROCESSING
- Set DeliveryStatus=Cancelled when payment fails (CompleteOrderPaymentCommandHandler)
- Set DeliveryStatus=Cancelled when order expires (ExpirePendingOrdersService)

src/CMSMicroservice.Infrastructure/BackgroundServices/ExpirePendingOrdersService.cs

@@ -89,6 +89,7 @@ public class ExpirePendingOrdersService : BackgroundService
 
                 // تغییر وضعیت به Reject
                 order.PaymentStatus = PaymentStatus.Reject;
+                order.DeliveryStatus = DeliveryStatus.Cancelled;
 
                 // آپدیت تراکنش مربوطه
                 if (order.TransactionId.HasValue)