feat(upserver): 保存M2客户端KV迁移至本人统计写检查点

保存独立KV用户服务、固定会话存档与原业务接线，以及C3d资料缓存和C3e本人统计写。
保留原PF/AGG路线、业务公式和时序；榜单读取、好友资料、公告、匹配及首场景闸仍待完成。

验证：ServiceHost两条件各33组646断言；Unity CLI Loop编译0错误269警告。
包含相关方案、评审裁决、测试及状态文档。未操作服务器、正式账号或打包。

Client/Assets/Scripts/EventOfferJourney/EventOfferJourneyData.cs

@@ -1,4 +1,4 @@
-using System.Text;
+using System.Text;
 using asap.core;
 using GameCore;
 using UnityEngine;
@@ -261,6 +261,8 @@ public class EventOfferJourneyBlockData
 
 public class EventOfferJourneyPlayfabData
 {
+    readonly game.PlayerDataStorage.IPlayerSaveStore saveStore = GContext.container.Resolve<game.PlayerDataStorage.IPlayerSaveStore>();
+
     public int EventId, Progress, TicketCount, VipLvlOnTrigger, RoundCount;
     public float InflationRate;
     private const string Key = "EventOfferJourneyData";
@@ -319,14 +321,14 @@ public class EventOfferJourneyPlayfabData
 
     public static EventOfferJourneyPlayfabData Load()
     {
-        var s = PlayFabMgr.Instance.GetLocalData(Key);
+        var s = GContext.container.Resolve<game.PlayerDataStorage.IPlayerSaveStore>().Read(Key).ValueOrThrow();
         return Deserialize(s);
     }
 
     public void Save()
     {
         var s = Serialize();
-        PlayFabMgr.Instance.UpdateUserDataValue(Key, s);
+        saveStore.Write(Key, s).RequireAccepted();
     }
 }