feat(core): fix duplicate issue with auditing

[RVANDO12]

PR Description

Issue when batch update of relation between entity.

" Caused by: java.sql.BatchUpdateException: Batch entry 1 insert into idp_core.relation_target_entities_aud "
" ERROR: duplicate key value violates unique constraint "relation_target_entities_aud_pkey"

Fixes

Database: Expand the relation_target_entities_aud_pkey to include target_entity_uuid.

Code: Strip targetEntityUuid out of the equals() and hashCode() methods in RelationTargetJpaEntity.java so that the Java Set correctly prevents duplicates before they ever reach Hibernate Envers.

Review

The reviewer must double-check these points:

• The reviewer has tested the feature
• The reviewer has reviewed the implementation of the feature
• The documentation has been updated
• The feature implementation respects the Technical Doc / ADR previously produced
• The Pull Request title has a ! after the type/scope to identify the breaking
  change in the release note and ensure we will release a major version.

How to test

Update a huge information about entity to cause the issue and check is not appears

[sonarqubecloud]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[github-code-quality]

Code Coverage Overview

Languages: Java

Java / code-coverage/jacoco

The overall coverage in the feat/audit/fix-dupli... branch remains at 90%, unchanged from the main branch.

Show a code coverage summary of the most impacted files.

File	main a98cccd	feat/audit/fix-dupli... 4464f69	+/-
com/decathlon/i...enceMapper.java	73%	65%	-8%

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