Article 클래스(엔티티) 코드 추가하기 - 1package com.tenco.demo._domain.blog.entity;import com.tenco.demo.common.errors.Exception400;import jakarta.persistence.Column;import jakarta.persistence.Entity;import jakarta.persistence.GeneratedValue;import jakarta.persistence.GenerationType;import jakarta.persistence.Id;import lombok.Builder;import lombok.Data;import lombok.NoArgsConstructor;// Entity 클래스 설계 시 주의사항..