Profiles: Cache user badge lookups

[dd32]

Splits the badge lookup cache change out of #677 so the support badge PR can stay focused.\n\nThis caches get_user_badges() in the existing user_meta cache group with a namespaced per-user key, and clears that cached badge list when badge group membership changes through the Profiles association handler.\n\nSee https://meta.trac.wordpress.org/ticket/2214.

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[Copilot]

Pull request overview

This PR introduces object-caching for Profile badge lookups (get_user_badges()) and ensures that cached badge data is invalidated when badge group membership changes via the Profiles association handler, reducing repeated DB queries for frequently-accessed badge data.

Changes:

• Cache get_user_badges() results in the user_meta object-cache group under a per-user, namespaced key.
• Invalidate the per-user badge cache when users are added to / removed from badge groups via the association handler.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
wordpress.org/public_html/wp-content/mu-plugins/pub/profile-helpers.php	Adds per-user caching for get_user_badges() lookups using a namespaced cache key.
profiles.wordpress.org/public_html/wp-content/plugins/wporg-profiles-association-handler/wporg-profiles-association-handler.php	Clears the per-user badge cache when badge group membership is modified through association requests.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.