chore: Remove deprecated KitIntegration.getAllUserAttributes()

[denischilik]

Background

KitIntegration.getAllUserAttributes() was deprecated in favor of filtered user APIs. This removes the method so custom kits rely on supported entry points.

What Has Changed

• Removed KitIntegration.getAllUserAttributes() and its list-flattening behavior
• Documented migration: use getCurrentUser().getUserAttributes() / FilteredMParticleUser and AttributeListener callbacks
• Removed unit tests that only asserted the deleted API
• Added CHANGELOG entry under Unreleased

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. (Removed tests for deleted API; no new behavior to cover.)
• I have tested this locally.

Additional Notes

Stacks on chore/remove-kitintegration-getUserIdentities (same line of kit API cleanup as getUserIdentities removal).

[cursor]

PR Summary

Medium Risk
Medium risk because this removes a previously-available (deprecated) kit API and will break compilation for any custom kits still calling it; runtime behavior for supported APIs is unchanged.

Overview
Removes the deprecated KitIntegration.getAllUserAttributes() API (including its list-flattening behavior), pushing kit authors to use getCurrentUser().getUserAttributes() / other FilteredMParticleUser APIs and AttributeListener callbacks.

Updates dataplan blocking instrumentation tests to assert against getCurrentUser()?.userAttributes and deletes the unit test suite that only validated the removed API; adds a corresponding Unreleased changelog entry.

^{Written by Cursor Bugbot for commit 05d62d5. This will update automatically on new commits. Configure here.}

[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