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/Duel/UI/EventFishingDuelPanel.cs

@@ -607,6 +607,12 @@ public class EventFishingDuelPanel : BasePanel
     }
     void CreateMatchmakingTicket()
     {
+        if (GContext.container.Resolve<IUserService>() is not PlayFabUserService)
+        {
+            Debug.LogWarning("KV matchmaking service is not connected.");
+            FDM.MachingEnd(null);
+            return;
+        }
         int MaxMatchTime = FDM.eventSoloConfig.MaxMatchTime;
         //可匹配段位列表，杯数，选择倍率，地图列表，随机种子seed,鱼卡等级
         List<int> matchTierList = FDM.eventSolomain.MatchTierList;
@@ -631,8 +637,8 @@ public class EventFishingDuelPanel : BasePanel
             {
                 Entity = new EntityKey
                 {
-                    Id = userService.entityKey.Id,
-                    Type = userService.entityKey.Type
+                    Id = ((PlayFabUserService)userService).entityKey.Id,
+                    Type = ((PlayFabUserService)userService).entityKey.Type
                 },
                 Attributes = new MatchmakingPlayerAttributes
                 {
@@ -717,6 +723,12 @@ public class EventFishingDuelPanel : BasePanel
     }
     void GetMatchDetails(string matchId)
     {
+        if (GContext.container.Resolve<IUserService>() is not PlayFabUserService)
+        {
+            Debug.LogWarning("KV matchmaking service is not connected.");
+            FDM.MachingEnd(null);
+            return;
+        }
         var request = new PlayFab.MultiplayerModels.GetMatchRequest
         {
             MatchId = matchId,
@@ -745,7 +757,7 @@ public class EventFishingDuelPanel : BasePanel
                         for (int i = 0; i < result.Members.Count; i++)
                         {
                             MatchmakingPlayerWithTeamAssignment member = result.Members[i];
-                            if (member.Entity.Id != userService.entityKey.Id)
+                            if (member.Entity.Id != ((PlayFabUserService)userService).entityKey.Id)
                             {
                                 JObject dataObject = JObject.FromObject(result.Members[i].Attributes.DataObject);
                                 string[] tierArray = dataObject["Tier"].ToObject<string[]>();