feat(usercreatorchat): openRoom 상대방 프로필을 반환한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/usercreatorchat/dto/UserCreatorChatDtos.kt

@@ -24,6 +24,8 @@ data class SendUserCreatorChatMessageResponse(
 
 data class UserCreatorChatRoomOpenResponse(
     val roomId: Long,
+    val opponentNickname: String,
+    val opponentProfileImageUrl: String,
     val messages: List<UserCreatorChatMessageItemDto>,
     val hasMore: Boolean,
     val nextCursor: Long?

src/main/kotlin/kr/co/vividnext/sodalive/v2/usercreatorchat/service/UserCreatorChatService.kt

@@ -73,9 +73,14 @@ class UserCreatorChatService(
     fun openRoom(member: Member, roomId: Long, limit: Int = 20): UserCreatorChatRoomOpenResponse {
         val room = findRoom(roomId)
         requireParticipant(roomId, member.id!!)
+        val opponent = participantRepository.findActiveOpponent(roomId, member.id!!)?.member
+            ?: throw SodaException(messageKey = "chat.room.invalid_access")
+        val opponentProfilePath = opponent.profileImage ?: "profile/default-profile.png"
         val page = getMessages(member, roomId, cursor = null, limit = limit)
         return UserCreatorChatRoomOpenResponse(
             roomId = room.id!!,
+            opponentNickname = opponent.nickname,
+            opponentProfileImageUrl = "$cloudFrontHost/$opponentProfilePath",
             messages = page.messages,
             hasMore = page.hasMore,
             nextCursor = page.nextCursor