Notification
⬇️ Lembrar de criar Getters and Setters + equals&hashcode com ID.
❗Nunca coloque um Set do relacionamento dentro do construtor.
@Entity
@Table(name = "tb_notification")
public class Notification {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String text;
    @Column(columnDefinition = "TIMESTAMP WITHOUT TIME ZONE")
    private Instant moment;
    private Boolean read;
    private String route;
    @ManyToOne
    @JoinColumn(name = "user_id")
    private User user;Atualizado