Merge pull request #8 from DearObjet/fix/userDomain

[FIX] User 도메인 ID 값 원상복구

Author: nickhealthy

src/main/java/app/dearobjet/backend/domain/user/entity/User.java

@@ -17,7 +17,7 @@ public class User extends BaseTimeEntity {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "user_id")
-    private Long id;
+    private Long userId;
 
     @Column(unique = true)
     private String email;