fix(chat): 채팅방 메시지

- 메시지 DB 타입을 TEXT로 변경

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

@@ -1,6 +1,7 @@
 package kr.co.vividnext.sodalive.chat.room
 
 import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.Column
 import javax.persistence.Entity
 import javax.persistence.FetchType
 import javax.persistence.JoinColumn
@@ -8,6 +9,7 @@ import javax.persistence.ManyToOne
 
 @Entity
 class ChatMessage(
+    @Column(columnDefinition = "TEXT", nullable = false)
     val message: String,
 
     @ManyToOne(fetch = FetchType.LAZY)