change package,change message_code

src/main/java/ru/soune/nocopy/entity/BaseEntity.java

@@ -0,0 +1,29 @@
+package ru.soune.nocopy.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+@Getter
+@Setter
+public abstract class BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @CreatedDate
+    @Column(name = "created_at", updatable = false, nullable = false)
+    private LocalDateTime createdAt;
+
+    @LastModifiedDate
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+}