实现单局 Run 模型的基础落地

- 核心改动在 RunModel.cs、RunStateFactory.cs 和 RunStateAdvanceService.cs。现在项目里有了 RunNodeType / RunNodeStatus / RunNodeSeed / RunNodeState / RunState，并支持用预置节点序列创建 Run，以及在节点完成后推进、更新局内库存快照、标记通关或失败。

- 库存边界也补上了。PlayerInventoryComponent.cs 新增了 ReplaceInventorySnapshot(...)，底层通过 PlayerInventoryStateStore.cs 重建工作副本，避免后续把 Run 真值硬塞回 PlayerInventory 内部状态。

- 节点事件载体已经扩展为可承载 Run 上下文，同时保留原来的无参 Create() 以兼容现有调用点。相关改动在 NodeEnterEventArgs.cs 和 NodeCompleteEventArgs.cs。

- 我还补了纯模型编辑器测试，覆盖 Run 创建、节点推进、失败标记和事件快照克隆，文件在 RunStateTests.cs。

Assets/GameMain/Scripts/CustomComponent/PlayerInventory/PlayerInventoryComponent.cs

@@ -45,6 +45,12 @@ namespace GeometryTD.CustomComponent
             return _queryModel.GetSnapshot();
         }
 
+        public void ReplaceInventorySnapshot(BackpackInventoryData inventorySnapshot)
+        {
+            EnsureServices();
+            _commandModel.ReplaceInventorySnapshot(inventorySnapshot, MaxParticipantTowerCount);
+        }
+
         public IReadOnlyList<TowerItemData> GetParticipantTowerSnapshot()
         {
             EnsureInitialized();

Assets/GameMain/Scripts/CustomComponent/PlayerInventory/PlayerInventoryStateStore.cs

@@ -89,6 +89,11 @@ namespace GeometryTD.CustomComponent
             _state.IsInitialized = true;
         }
 
+        public void ReplaceInventorySnapshot(BackpackInventoryData sourceInventory, int maxParticipantTowerCount)
+        {
+            Initialize(sourceInventory, maxParticipantTowerCount);
+        }
+
         public PlayerInventoryMergeSummary MergeInventory(BackpackInventoryData gainedInventory)
         {
             PlayerInventoryMergeSummary summary = default;