feat(api): add async error handling to critical module handlers

Wrap async operations at application layer boundaries with proper
try/catch, LoggerService logging, and domain exceptions:
- UploadMediaHandler: mediaStorage.upload() error boundary
- ExportUserDataHandler: Promise.all() error logging
- ForceDeleteUserHandler: $transaction error logging
- LoginUserHandler: token generation error boundary
- RefreshTokenHandler: token rotation error boundary
- CreatePaymentHandler: payment gateway call error boundary

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/payments/application/commands/create-payment/create-payment.handler.ts

@@ -65,13 +65,24 @@ export class CreatePaymentHandler implements ICommandHandler<CreatePaymentComman
 
     // Get payment gateway and create URL
     const gateway = this.gatewayFactory.getGateway(command.provider);
-    const { paymentUrl, providerTxId } = await gateway.createPaymentUrl({
-      orderId: paymentId,
-      amountVND: command.amountVND,
-      description: command.description,
-      returnUrl: command.returnUrl,
-      ipAddress: command.ipAddress,
-    });
+    let paymentUrl: string;
+    let providerTxId: string;
+    try {
+      ({ paymentUrl, providerTxId } = await gateway.createPaymentUrl({
+        orderId: paymentId,
+        amountVND: command.amountVND,
+        description: command.description,
+        returnUrl: command.returnUrl,
+        ipAddress: command.ipAddress,
+      }));
+    } catch (error) {
+      this.logger.error(
+        `Payment gateway ${command.provider} failed for order ${paymentId}: ${error instanceof Error ? error.message : error}`,
+        error instanceof Error ? error.stack : undefined,
+        'CreatePaymentHandler',
+      );
+      throw new ValidationException('Không thể tạo liên kết thanh toán, vui lòng thử lại');
+    }
 
     // Mark processing and save
     payment.markProcessing(providerTxId);