feat: Auditing 없이 Persistable만 정의된 BaseEntity 추가

src/main/kotlin/roomescape/common/entity/BaseEntity.kt

@@ -33,3 +33,22 @@ abstract class BaseEntity(
     abstract override fun getId(): Long?
 
 }
+
+@MappedSuperclass
+abstract class PersistableBaseEntity(
+    @Id
+    @Column(name = "id")
+    private val _id: Long,
+
+    @Transient
+    private var isNewEntity: Boolean = true
+): Persistable<Long> {
+    @PostLoad
+    @PostPersist
+    fun markNotNew() {
+        isNewEntity = false
+    }
+
+    override fun isNew(): Boolean = isNewEntity
+    override fun getId(): Long = _id
+}