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/Shop/ThanksGivingPackData.cs

@@ -1,4 +1,4 @@
-using UnityEngine;
+using UnityEngine;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -18,6 +18,13 @@ namespace GameCore
 }
 public class ThanksGivingPackData : IProgressChainPackData
 {
+    protected game.PlayerDataStorage.IPlayerSaveStore saveStore;
+    internal void BindSaveStore(game.PlayerDataStorage.IPlayerSaveStore store)
+    {
+        if (saveStore != null && !ReferenceEquals(saveStore, store)) throw new System.InvalidOperationException("Archive store cannot change login.");
+        saveStore = store;
+    }
+
     protected Data _data = new Data(0, 0, 0, 0);
 
     internal static game.PlayerDataStorage.PlayerKVProgressPackState DecodeForKVLoad(IReadOnlyDictionary<string,string> raw,
@@ -149,7 +156,7 @@ public class ThanksGivingPackData : IProgressChainPackData
 
     public void UploadData()
     {
-        PlayFabMgr.Instance.UpdateUserDataValue(key, _data.Serialize());
+        saveStore.Write(key, _data.Serialize()).RequireAccepted();
     }
     public void LoadData(string s)
     {