fix: order id NPE 수정

src/main/java/in/koreatech/payment/client/dto/response/PaymentConfirmResponse.java

@@ -3,6 +3,7 @@
 import java.time.LocalDateTime;
 import java.time.OffsetDateTime;
 
+import in.koreatech.koin.domain.order.model.Order;
 import in.koreatech.koin.domain.order.model.Payment;
 import in.koreatech.koin.domain.order.model.PaymentMethod;
 import in.koreatech.koin.domain.order.model.PaymentStatus;
@@ -15,7 +16,7 @@ public record PaymentConfirmResponse(
     String requestedAt,
     String approvedAt
 ) {
-    public Payment toEntity() {
+    public Payment toEntity(Order order) {
         OffsetDateTime requestedOffsetDateTime = OffsetDateTime.parse(requestedAt);
         OffsetDateTime approvedOffsetDateTime = OffsetDateTime.parse(approvedAt);
 
@@ -29,6 +30,7 @@ public Payment toEntity() {
             .paymentMethod(PaymentMethod.from(method))
             .requestedAt(requested)
             .approvedAt(approved)
+            .order(order)
             .build();
     }
 }

src/main/java/in/koreatech/payment/service/TossService.java

@@ -155,7 +155,7 @@ public Payment confirmPayment(String accessToken, String paymentKey, String orde
             .toList();
         orderMenuRepository.saveAll(orderMenus);
 
-        Payment payment = response.toEntity();
+        Payment payment = response.toEntity(order);
         paymentRepository.save(payment);
         temporaryPaymentRedisRepository.deleteById(orderId);
         cartRepository.deleteByUserId(user.getId());