refactor: Member SoftDelete로 변경 (#155)

Author: jaegyun1011

backend/src/main/java/com/back/domain/member/entity/Member.java

@@ -5,6 +5,7 @@
 import com.back.global.jpa.entity.BaseEntity;
 import jakarta.persistence.*;
 import lombok.*;
+import org.hibernate.annotations.SoftDelete;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 
@@ -17,6 +18,7 @@
 @NoArgsConstructor
 @AllArgsConstructor
 @Builder(toBuilder=true)
+@SoftDelete
 public class Member extends BaseEntity {
     // *** 회원 정보 ***
     @Column(unique = true)

backend/src/main/java/com/back/domain/member/service/MemberService.java

@@ -91,6 +91,7 @@ public void genCode(Member member) {
 
     //회원 탈퇴
     public void delete(Member member) {
+        member.setEmail("DELETED_" + member.getEmail());
         memberStatisticService.delete(member);
         memberRepository.delete(member);
     }