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/PartnerFishBowl/EventPartnerData.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using asap.core;
@@ -15,6 +15,8 @@ using UniRx;
 
 public class EventPartnerData
 {
+    readonly game.PlayerDataStorage.IPlayerSaveStore saveStore = GContext.container.Resolve<game.PlayerDataStorage.IPlayerSaveStore>();
+
     private bool _lock = false, _whole = false;
     private MetaData _data;
     private readonly Tables _tables = GContext.container.Resolve<Tables>();
@@ -201,12 +203,13 @@ public class EventPartnerData
                 }
                 Debug.Log($"Cache Done");
             }
-            var pfString = PlayFabMgr.Instance.GetLocalData(EventPartnerPlayfabData.Key);
+            var pfString = saveStore.Read(EventPartnerPlayfabData.Key).ValueOrThrow();
             EventPartnerPlayfabData pfData = EventPartnerPlayfabData.FromString(pfString);
             Debug.Log($"<color=#2d7cee>[EventPartner] Try get response in load data:</color>");
             var detailRequest = new EventBuildDetailRequest() { eventId = e.ID };
             var response = await GContext.container.Resolve<ICustomServerMgr>()
                 .EventPartnerRequest<EventBuildDetailResp>(DetailUrl, detailRequest);
+            if (!saveStore.IsCurrent) throw new System.OperationCanceledException();
             if (response == null)
             {
                 response = new EventBuildDetailResp();
@@ -1362,6 +1365,8 @@ public class EventPartnerData
 
     public class EventPartnerPlayfabData
     {
+    readonly game.PlayerDataStorage.IPlayerSaveStore saveStore = GContext.container.Resolve<game.PlayerDataStorage.IPlayerSaveStore>();
+
         [JsonIgnore]
         public const string Key = "EventPartnerData";
         public int EventId { get; set; }
@@ -1374,7 +1379,7 @@ public class EventPartnerData
         public void Save()
         {
             var s = JsonConvert.SerializeObject(this);
-            PlayFabMgr.Instance.UpdateUserDataValue("EventPartnerData", s);
+            saveStore.Write("EventPartnerData", s).RequireAccepted();
         }
 
         public static EventPartnerPlayfabData FromString(string s)