fix(chat-room): ONLY_FULL_GROUP_BY로 인한 그룹화 오류 수정

src/main/kotlin/kr/co/vividnext/sodalive/chat/room/repository/ChatRoomRepository.kt

@@ -53,7 +53,7 @@ interface ChatRoomRepository : JpaRepository<ChatRoom, Long> {
               AND pc.participantType = kr.co.vividnext.sodalive.chat.room.ParticipantType.CHARACTER
               AND pc.isActive = true
               AND r.isActive = true
-            GROUP BY r.id, r.title, r.createdAt, pc.character.imagePath
+            GROUP BY r.id, r.title, r.createdAt, pc.character.imagePath, pc.character.characterType
             ORDER BY COALESCE(MAX(m.createdAt), r.createdAt) DESC
         """
     )