Merge pull request #170 from Uni-Made/feature/#168

🐛 [FIX] 상품 구매 시 트랜잭션 오류 발생 #168

src/main/java/umc/unimade/domain/notification/service/BuyerNotificationService.java

@@ -179,6 +179,7 @@ private void sendNotification(String socialId, NotificationRequest notificationR
                         .buyer(buyer)
                         .title(notificationRequest.getTitle())
                         .body(notificationRequest.getBody())
+                        .extraId(notificationRequest.getId())
                         .build();
                 buyerNotificationRepository.save(notification);
             }