PracticeController.Finish now uses MissionEventKeys.Practice.WinAll — the
counter keys emitted match the catalog's named form (practice_win:elite:arisa
etc.), closing the numeric-vs-named mismatch that had all practice-elite
achievements silently at zero. Also removes the "bridging is a follow-up" TODO.
StoryController.Finish uses MissionEventKeys.Story.ChapterFinishAll for the
same shape. ItemPurchaseController.CounterKey routes through
MissionEventKeys.ItemPurchase so the "item_purchase:" prefix has one owner.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>