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/DataCenter/FishingChallengeManager.cs

@@ -1,4 +1,4 @@
-using asap.core;
+using asap.core;
 using cfg;
 using game;
 using GameCore;
@@ -40,6 +40,8 @@ public class FishingChallengeData
 
 public class FishingChallengeManager
 {
+        [asap.core.Inject] public game.PlayerDataStorage.IPlayerSaveStore SaveStore { get; set; }
+
     //
     private const string SaveKey = "FishingChallengeData";
 
@@ -69,7 +71,11 @@ public class FishingChallengeManager
         game.PlayerDataStorage.PlayerKVSaveSchema.DecodeChallenge(raw,snapshot,errors);
     internal void ResetForKVLoad()
     {
-        fishingChallengeData=null; IsInit=false; PrefabName=null; TopRankTier=Rank=FullStep=PlayerFullNumber=PreScore=_cheatingScore=0;
+        fishingChallengeData=null; IsInit=false; PrefabName=null;
+#if UNITY_EDITOR
+        _cheatingScore=0;
+#endif
+        TopRankTier=Rank=FullStep=PlayerFullNumber=PreScore=0;
         CurFishingEventData=null; StartTime=EndTime=default; eventChallengeMain=null; eventChallengeConfig=null; challengeMapData=null; itemDataList=null;
         _stageDropList.Clear(); _eliminateListScore.Clear(); _eventTrackStageList=new List<int>(); _eventTrackNormalRewardList=new List<int>(); InVisibleReason=string.Empty;
     }
@@ -1081,7 +1087,7 @@ public class FishingChallengeManager
 
     private void DoSave()
     {
-        PlayFabMgr.Instance.UpdateUserDataValue(SaveKey, JsonConvert.SerializeObject(fishingChallengeData));
+        SaveStore.Write(SaveKey, JsonConvert.SerializeObject(fishingChallengeData)).RequireAccepted();
     }
 
     public string GetOpenEventKey()