Add more information to @CreatedBy

I've a Spring Boot 2.3 application. All my entities extends an abtract entity that has some auditing fields like:

@CreatedBy
@Column(updatable = false)
protected String createdBy;

@CreatedDate
@Column(nullable = false, updatable = false)
protected Instant createdDate;

I implemented AuditorAware:

public class SpringSecurityAuditorAware implements AuditorAware<String> {

    public static final String SYSTEM_USER = "system";

    @Override
    public Optional<String> getCurrentAuditor() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

        if (authentication == null || !authentication.isAuthenticated()) {
            return Optional.of(SYSTEM_USER);
        }

        Object principal = authentication.getPrincipal();

        /**
         * If the principal is a CustomUserDetail I access to the name property
         */
        if (principal instanceof CustomUserDetail) {
            CustomUserDetail user = (CustomUserDetail) principal;
            // the sid of the user if not null or the username instead
            String sid = user.getSid() != null ? user.getSid() : user.getUsername();
            return Optional.ofNullable(sid);
        }

        return Optional.of(authentication.getName());
    }
}

In createdBy field I save the sid (identifier) of the user. In this way I've a reference to the source table and I can keep a link between all changes and the user.
However, for performance reasons, I'd like to save also the full name of the user in each entity.
Is there a clean way to reach this goal? The only thing I can think of is to use an EntityListener and set createdByName on @PrePersist for example.

@Component
public class MyEntityListener { 

 @PrePersist
 private void onPrePersist(MyAbstractEntity entity) {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

        if (authentication != null) {
              Object principal = authentication.getPrincipal();
              if (principal instanceof CustomUserDetail) {
                    CustomUserDetail user = (CustomUserDetail) principal;
                    entity.setCreatedByName(user.getFullName());
              }
        }
 }
}

What do you think about? Do you have any other better/clean approach?

The field annotated as @CreatedBy can be of any type. I think that one approach could be to create an AuditUser class having fields like userId and userFullName, and annotate it as @Embeddable (in case, also with @AttributeOverrides to declare how you want your table columns to be named). Then, in your entity you can have an AuditUser field annotated with @CreatedBy and @Embedded, combined with an implementation of AuditorAware<AuditUser>. More info on embeddable objects in this blog post (Baeldung).

If you needed something more specific, you could think of creating something custom, inspired from how Spring implemented the JPA auditing (looking at the classes AuditingEntityListener, AuditingHandler, and AnnotationAuditingMetadata).