feat(character chat room): 채팅방, 채팅메시지, 채팅방 참여자 엔티티 구성

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

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+package kr.co.vividnext.sodalive.chat.room
+
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.Entity
+import javax.persistence.FetchType
+import javax.persistence.JoinColumn
+import javax.persistence.ManyToOne
+
+@Entity
+class CharacterChatMessage(
+    val message: String,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "chat_room_id", nullable = false)
+    val chatRoom: CharacterChatRoom,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "participant_id", nullable = false)
+    val participant: CharacterChatParticipant,
+
+    val isActive: Boolean = true
+) : BaseEntity()

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

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+package kr.co.vividnext.sodalive.chat.room
+
+import kr.co.vividnext.sodalive.chat.character.ChatCharacter
+import kr.co.vividnext.sodalive.common.BaseEntity
+import kr.co.vividnext.sodalive.member.Member
+import javax.persistence.CascadeType
+import javax.persistence.Entity
+import javax.persistence.EnumType
+import javax.persistence.Enumerated
+import javax.persistence.FetchType
+import javax.persistence.JoinColumn
+import javax.persistence.ManyToOne
+import javax.persistence.OneToMany
+
+@Entity
+class CharacterChatParticipant(
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "chat_room_id", nullable = false)
+    val chatRoom: CharacterChatRoom,
+
+    @Enumerated(EnumType.STRING)
+    val participantType: ParticipantType,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    val member: Member? = null,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "character_id")
+    val character: ChatCharacter? = null,
+
+    val isActive: Boolean = true
+) : BaseEntity() {
+    @OneToMany(mappedBy = "participant", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
+    val messages: MutableList<CharacterChatMessage> = mutableListOf()
+}
+
+enum class ParticipantType {
+    USER, CHARACTER
+}

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

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+package kr.co.vividnext.sodalive.chat.room
+
+import kr.co.vividnext.sodalive.common.BaseEntity
+import javax.persistence.CascadeType
+import javax.persistence.Entity
+import javax.persistence.FetchType
+import javax.persistence.OneToMany
+
+@Entity
+class CharacterChatRoom(
+    val sessionId: String,
+    val title: String,
+    val isActive: Boolean = true
+) : BaseEntity() {
+    @OneToMany(mappedBy = "chatRoom", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
+    val messages: MutableList<CharacterChatMessage> = mutableListOf()
+
+    @OneToMany(mappedBy = "chatRoom", cascade = [CascadeType.ALL], fetch = FetchType.LAZY)
+    val participants: MutableList<CharacterChatParticipant> = mutableListOf()
+}