fix: add missing UserWalletChangeLog for discount shop purchases and discount wallet charge

Bug: when buying from discount shop, DiscountBalance was deducted from DB
but no UserWalletChangeLog was created — making it invisible in wallet history.
Same issue existed for discount wallet top-up (charge).

Fixed in 3 handlers:
- PlaceOrderCommandHandler (fully paid by discount balance path)
- CompleteOrderPaymentCommandHandler (gateway + discount balance path)
- VerifyDiscountWalletChargeCommandHandler (discount wallet charge)

src/CMSMicroservice.Application/WalletCQ/Commands/VerifyDiscountWalletCharge/VerifyDiscountWalletChargeCommandHandler.cs

@@ -114,6 +114,21 @@ public class VerifyDiscountWalletChargeCommandHandler
             _context.Transactions.Add(transaction);
             await _context.SaveChangesAsync(cancellationToken);
 
+            // ثبت لاگ تغییرات کیف پول (بعد از ایجاد Transaction برای داشتن TransactionId)
+            _context.UserWalletChangeLogs.Add(new Domain.Entities.UserWalletChangeLog
+            {
+                WalletId = wallet.Id,
+                CurrentBalance = wallet.Balance,
+                ChangeValue = 0,
+                CurrentNetworkBalance = wallet.NetworkBalance,
+                ChangeNerworkValue = 0,
+                CurrentDiscountBalance = wallet.DiscountBalance,
+                ChangeDiscountValue = request.Amount,
+                IsIncrease = true,
+                RefrenceId = transaction.Id
+            });
+            await _context.SaveChangesAsync(cancellationToken);
+
             // لینک PaymentTransaction به Transaction داخلی
             if (paymentTx != null)
             {