Stage 9.2: mixer operator Tumbler storyline with key drive item

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Decentralized/Night.cs

@@ -143,6 +143,7 @@ namespace Decentralized
             var d = Session.Data;
             int day = StoreStation.GetDayCounter();
             StoryLinks.Night(d, day);
+            TumblerStory.Night(d, day);
             var events = ActiveEvents();
             Log.Info($"夜间事件：{string.Join(",", events)}（新增 {string.Join(",", events.Where(e => !d.ActiveEvents.Contains(e)))}），黑市声望 {StoreReputation.GetBMReputation()}");
             bool wasSanctioned = d.Mixer.Sanctioned(day);