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/Services/FriendService.cs

@@ -1,4 +1,4 @@
-using asap.core;
+using asap.core;
 using asap.playfab.async;
 using GameCore;
 using PlayFab.ClientModels;
@@ -14,6 +14,7 @@ namespace game
 {
     public class FriendService
     {
+        [Inject] public PlayerDataStorage.IPlayerSaveStore SaveStore { get; set; }
         [Inject]
         public IUserService userService { get; set; }
 
@@ -45,7 +46,7 @@ namespace game
         {
             List<cfg.Invite> invites = tables.TbInvite.DataList;
             //已经领取奖励的数量
-            string receiveRewardCountStr = PlayFabMgr.Instance.GetLocalData(InviteLinkRewardCountKey);
+            string receiveRewardCountStr = SaveStore.Read(InviteLinkRewardCountKey).ValueOrThrow();
             int.TryParse(receiveRewardCountStr, out InviteLinkRewardCount);
             int canRewardCount = InviteLinkRewardCount;
             for (int i = InviteLinkRewardCount; i < invites.Count; i++)
@@ -93,7 +94,7 @@ namespace game
                 GContext.container.Resolve<PlayerItemData>().AddItemByDropList(DropIDs, null);
                 GContext.Publish(new ShowData());
                 InviteLinkRewardCount = canRewardCount;
-                PlayFabMgr.Instance.UpdateUserDataValue(InviteLinkRewardCountKey, InviteLinkRewardCount.ToString());
+                SaveStore.Write(InviteLinkRewardCountKey, InviteLinkRewardCount.ToString()).RequireAccepted();
                 RedPointManager.Instance.SetRedPointState(RedPointName.Home_Invite, false);
 #if AGG
                 using (var e = GEvent.GameEvent("invite_reward"))