chore: 알림 읽음 디버그 로그 추가

Author: lejuho

src/main/java/com/example/cp_main_be/domain/member/notification/service/NotificationService.java

@@ -206,6 +206,12 @@ private String makeTimeIncludeId(Long userId) {
   public List<NotificationResponse> getNotifications(Long userId) {
     List<Notification> notifications =
         notificationRepository.findAllByReceiverIdOrderByCreatedAtDesc(userId);
+    long unreadCount = notifications.stream().filter(notification -> !notification.isRead()).count();
+    log.info(
+        "[NOTIFICATION_FETCH] userId={}, totalCount={}, unreadCount={}",
+        userId,
+        notifications.size(),
+        unreadCount);
     return notifications.stream().map(NotificationResponse::from).collect(Collectors.toList());
   }