hotfix : 채팅방 조회 쿼리 수정

Author: yyytir777

src/main/java/ita/tinybite/domain/chat/service/ChatRoomService.java

@@ -90,7 +90,7 @@ public List<GroupChatRoomResDto> getGroupRooms() {
                     String recentContent = recentMessage != null ? recentMessage.getContent() : null;
                     String timeAgo = getTimeAgo(chatRoom.getCreatedAt());
 
-                    ChatRoomMember chatRoomMember = chatRoomMemberRepository.findByChatRoomAndUserAndChatRoom_Type(chatRoom, user, ChatRoomType.GROUP).orElseThrow();
+                    ChatRoomMember chatRoomMember = chatRoomMemberRepository.findByChatRoomAndUserAndChatRoom_Type(chatRoom, user, ChatRoomType.GROUP).stream().findFirst().get();
 
                     // 마지막으로 읽은 시점을 기점으로 몇 개의 메시지가 안 읽혔는지 확인
                     long unreadCnt = chatMessageRepository.countByChatRoomIdAndCreatedAtAfterAndSenderIdNot(chatRoom.getId(), chatRoomMember.getLastReadAt(), user.getUserId());