v13.15.0
[6.x] Alpha ordered imports (#29933)
[12.x] Run Mockery cleanup via PHPUnit subscriber instead of explicit `m::close()` calls (#58278)
[13.x] Add enum support to NotificationChannelManager channel and driver methods (#59783)
[13.x] Fix time-sensitive flaky test in NotificationDatabaseChannelTest (#60333)
Apply fixes from StyleCI
feat: respect DeleteWhenMissingModels attribute on queued notifications (#58908)
[13.x] Fix: Allow runtime property overrides (onQueue) to take precedence over class attributes (#59468)