refactor: 기기당 한 개의 리프래시 토큰을 가질 수 있게 수정

Author: jinwon1234

src/main/java/apptive/team5/jwt/domain/RefreshToken.java

@@ -26,7 +26,7 @@ public class RefreshToken {
     @Column(unique = true, nullable = false)
     private String token;
 
-    @ManyToOne(fetch = FetchType.LAZY)
+    @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", unique = true, nullable = false)
     private UserEntity user;
 

src/main/java/apptive/team5/user/domain/UserEntity.java

@@ -1,5 +1,6 @@
 package apptive.team5.user.domain;
 
+import apptive.team5.jwt.domain.RefreshToken;
 import apptive.team5.oauth2.dto.OAuth2Response;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
@@ -35,6 +36,9 @@ public class UserEntity {
     @Column(nullable = false)
     private SocialType socialType;
 
+    @OneToOne(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
+    private RefreshToken refreshToken;
+
     public UserEntity(String identifier, String email, String username, UserRoleType roleType, SocialType socialType) {
         this.identifier = identifier;
         this.email = email;