Keycloak 19 cannot register post logout redirect URIs whose length in total is over 4000

[tnorimat]

Describe the bug

In the previous version of keycloak, we could register post logout redirect URIs whose length in total is over 4000 to Valid Redirect URIs field of client settings.
In keycloak 19, post logout redirect URIs needs to be stored in post logout redirect URIs field of client settings inpendently. However, when I tried to register such the post logout redirect URIs that could be registered in the previous version on keycloak, I encountered the exception (javax.persistence.PersistenceException).

Version

19.0.0, 19.0.1

Expected behavior

Several post logout redirect URIs whose length in total is over 4000 can be successfully registered.

Actual behavior

The exception (javax.persistence.PersistenceException) is thrown.

How to Reproduce?

On client settings, try to register several post logout redirect URIs whose length in total is over 4000.

Anything else?

It seems that this exception is thrown because ClientAttributeEntity put the following limitation on value field.

@Table(name="CLIENT_ATTRIBUTES")
@Entity
@IdClass(ClientAttributeEntity.Key.class)
public class ClientAttributeEntity {

    @Id
    @ManyToOne(fetch= FetchType.LAZY)
    @JoinColumn(name = "CLIENT_ID")
    protected ClientEntity client;

    @Id
    @Column(name="NAME")
    protected String name;

    @Column(name = "VALUE", length = 4000)
    protected String value;

From keycloak 19.0.0, post logout redirect URIs are stored as Client Attribute.

I propose that we would lift the limitation on value field of ClientAttributeEntity the same as RoleAttributeEntity, GroupAttributeEntity, UserAttributeEntity, and RealmAttributeEntity.