Entity creation: improved speed (avoid validating sibling keys when not necessary)

[SteRiccio]

This fix uses the node "flags" (created/updated/deleted) used by Arena (desktop) to update the RDB.
In multiple entities with key, when a new entity is added, some key nodes should be re-validated (they could be duplicate). There are 2 cases:

• the key is marked as autoincremental: when node is created, the default value will be unique, so there is no need to validate other key nodes;
• the key is not marked as autoincremental: only nodes with the same value should be re-validated;

When a key attribute is updated, key nodes with the same value or key nodes with errors (they could be already marked as duplicate) should be re-validated.

Once an entity is created or a node updated, all updated nodes flags should be removed (outside of RecordUpdater function call invocation).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud