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/UI/PartnerStatue/EventPartnerStatueTokenExchangeData.cs

@@ -1,4 +1,4 @@
-using UnityEngine;
+using UnityEngine;
 using asap.core;
 using System.Collections.Generic;
 using UniRx;
@@ -40,6 +40,8 @@ public class EventPartnerStatueTokenExchangeFishRaid
 
 public class EventPartnerStatueTokenExchangeData
 {
+    readonly game.PlayerDataStorage.IPlayerSaveStore saveStore = GContext.container.Resolve<game.PlayerDataStorage.IPlayerSaveStore>();
+
     #region State
     private int _eventId = 0;
     private int _tokenGiven = 0;
@@ -189,12 +191,12 @@ public class EventPartnerStatueTokenExchangeData
 
     public void SaveData()
     {
-        PlayFabMgr.Instance.UpdateUserDataValue(PlayfabKey, $"{_eventId}|{_tokenGiven}|{_currentScore}");
+        saveStore.Write(PlayfabKey, $"{_eventId}|{_tokenGiven}|{_currentScore}").RequireAccepted();
     }
 
     public bool LoadData()
     {
-        var s = PlayFabMgr.Instance.GetLocalData(PlayfabKey);
+        var s = saveStore.Read(PlayfabKey).ValueOrThrow();
         if (s == null)
             return false;
         try