Split: Persisting new entries on PostgreSql doesn't work with the generated dialog

[ivy-rew]

Dear @ivy-sgi, we have found the following bug,
splitted fron #64 reported by @FrohnmaierMariano-prodato :

we have an Excel table named "personal", looks as follows:

Bug Description

The persistence save method doesn't work, as the id is not generated, when using PostgreSQL. This might be related to issue 24

To Reproduce

1. start process
2. create a new entry via respective button and fill in the text fields in the detail view
3. click on Proceed button to save the new entity => causes error message (see below)

Potential Workaround:

Tick the generated property in the following window in the entity class:

Expected behavior

Both buttons should work.

Error Screenshots

IvyScriptRuntimeException: IvyScript Runtime Exception in
Instruction:
   ivy.persistence.pu.persist(out.edit)
Block:
my.namespace.ausleihe.PersonalManager.PersonalManagerData out;
out = in;
if ! out.edit.#id.is initialized()
{
   out.edit = (ivy.persistence.pu.persist(out.edit) AS my.namespace.ausleihe.Personal);
   out.entries.add(out.edit);
}
else
{
   ivy.persistence.pu.merge(out.edit);
};
out.edit = null;
IvyScriptMethodInvocationException: Error calling method persist(Object) on an object of class ch.ivyteam.ivy.process.data.persistence.internal.IvyEntityManager.
PersistenceException: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): my.namespace.ausleihe.Personal
IdentifierGenerationException: ids for this class must be manually assigned before calling save(): my.namespace.ausleihe.Personal

Desktop (please complete the following information):

• OS: Windows
• Browser: integrated webbrowser in Designer Version 10.0.21
• Excel Importer Version: 10.0.12
• PostgreSQL DB: PostgreSQL 15.8 (Debian 15.8-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit