CVE-2026-55779 Silverstripe Versioned: XSS in archive admin restore

Silverstripe Versioned provides versioning for Silverstripe models. Prior to 3.2.1, RestoreAction::getRestoreMessage in src/RestoreAction.php builds ArchiveAdmin restore notifications rendered as CASTHTML and inserts $restoredItem-Title, $restoredItem-URLSegment, $restoredItem-CMSEditLink, and...