[ON-78] 댓글창에서의 실시간 채팅 구현 [ON-78]: https://onewayticket.atlassian.net/browse/ON-78?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ
