fix(circles): preserve group display names when creating circles

[joshtrichards]

• Resolves: #

Summary

Fixes the display name of group-backed circles being initialized with the internal group ID instead of the group’s display name.

Related to nextcloud/collectives#1510

Root cause:

When a local group circle is created, FederatedUserService::getGroupCircle() already loads the corresponding group but initializes the circle with:

$circle->setDisplayName($groupId);

Notes:

• This fix corrects newly created group circles, but existing Circles records may still have the group ID in cached_name. Best as I can tell, existing records should (eventually) be repaired by Circles’ synchronization or a migration/maintenance tasks.

TODO

• ...

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI

[joshtrichards]

/backport to stable34

[joshtrichards]

/backport to stable33

[mejo-]

Looks good to me.