refactor: Route bulk user attribute sync through onSetAllUserAttributes

[denischilik]

Background

Bulk user attribute sync is now delivered through BaseAttributeListener.onSetAllUserAttributes so kits implement one callback instead of maintaining a separate setAllUserAttributes helper. AttributeListener no longer declares setAllUserAttributes.

What Has Changed

• Added onSetAllUserAttributes on BaseAttributeListener; KitManagerImpl calls it when user attributes are received or lists are supported.
• Removed setAllUserAttributes from AttributeListener; kits implement logic directly in onSetAllUserAttributes (including former dual-listener delegation).
• Inlined prior setAllUserAttributes helpers in affected kits and AttributeListenerTestKit; updated KitManagerImplTest expectations.

Screenshots/Video

N/A

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

Target branch: workstation/6.0-Release.

[cursor]

PR Summary

Medium Risk
Changes the core forwarding path for bulk user attribute synchronization across all kits; incorrect listener wiring or list-merging behavior could cause missing or malformed user attributes in partner SDKs.

Overview
Bulk user attribute synchronization is refactored to go through a single callback, BaseAttributeListener.onSetAllUserAttributes(userAttributes, userAttributeLists, user), and AttributeListener no longer exposes the legacy setAllUserAttributes method.

KitManagerImpl.onUserAttributesReceived is simplified to always target BaseAttributeListener and to consistently pass a FilteredMParticleUser, while preserving the existing behavior of merging list attributes into scalar CSV values when a kit reports supportsAttributeLists() == false.

Affected kits and test kits are updated to implement onSetAllUserAttributes directly (removing/inlineing prior setAllUserAttributes helpers), and KitManagerImplTest assertions are updated to verify the new callback signature.

^{Written by Cursor Bugbot for commit 641a6d3. This will update automatically on new commits. Configure here.}

[sonarqubecloud]

Quality Gate failed

Failed conditions
71.0% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud