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。

CodexOutput/upserver/B3BatchMigration/M2/C2d修改前快照/096-ChainPackWithProgressData.cs.txt

@@ -0,0 +1,36 @@
+using asap.core;
+using cfg;
+using GameCore;
+namespace GameCore
+{
+    public partial class FishingEventData
+    {
+        public readonly ChainPackWithProgressMigrationData ChainPackWithProgressMigrationData = new ChainPackWithProgressMigrationData();
+    }
+
+}
+public class ChainPackWithProgressMigrationData : ThanksGivingPackData
+{
+    internal new static game.PlayerDataStorage.PlayerKVProgressPackState DecodeForKVLoad(System.Collections.Generic.IReadOnlyDictionary<string,string> raw,
+        game.PlayerDataStorage.PlayerKVSchemaDiagnostics errors) =>
+        game.PlayerDataStorage.PlayerKVSaveSchema.DecodeProgressPack(raw,true,errors);
+    public new const string Key = "ThanksGivingPackMigrationData";
+    public override string RedPointKey => "thanks_giving";
+    protected override string key => Key;
+    public void UpdateData(int eventId, int packId)
+    {
+        // Debug.Log($"<color=#f18c0a>Updatedata {e.ID}, {e.RedirectID}, {TokenProgress}, {ChainProgress}</color>");
+        if (eventId == 0 || packId == 0)
+            return;
+        var oldData = GContext.container.Resolve<FishingEventData>().ThanksGivingPackData;
+        if (!GContext.container.Resolve<Tables>().TbFishingEvent.DataMap.ContainsKey(oldData.EventId)
+            && oldData.PackId == packId)
+        {
+            _data = new Data(eventId: eventId, redirectId: packId, tokenProgress: oldData.TokenProgress, chainProgress: oldData.ChainProgress);
+            saveStore.Write(ThanksGivingPackData.Key, "").RequireAccepted();
+        }
+        else
+            _data = new Data(eventId: eventId, redirectId: packId, tokenProgress: 0, chainProgress: 0);
+    }
+
+}