Updating an entity updates the creation timestamp (and the update timestamp)

[DavideD]

See quarkusio/quarkus#39016

We need to check if this is actually happening in Hibernate Reactive and add tests for it (if we don't have some already).

After updating an entity both createdAt and updatedAt are returned with the the updatedAt value. However, createdAt is not being persisted to the database. When I list the records from the database the results are returned correctly. I'm using the same DTO object for both operations.

Column(name = "created_at", updatable = false, nullable = false)
@CreationTimestamp
public LocalDateTime createdAt;

@Column(name = "updated_at", nullable = false)
@UpdateTimestamp
public LocalDateTime updatedAt;