feat(workflow): 添加节点类型字段支持

- 在 ApiResult 类中新增 NodeType 属性
- 在工作流引擎查询中添加节点类型映射
- 实现节点类型数据的返回功能

OpenAuth.App/workflow/ApiResult.cs

@@ -120,6 +120,8 @@ public class FlowQuerySingleResultDto
 
     public int? Type { get; set; }
     public string WorkStatus { get; set; }
+    
+    public string NodeType { get; set; }
 }
 
 /// <summary>

OpenAuth.App/workflow/WorkflowEngineApp.cs

@@ -451,7 +451,8 @@ public class WorkflowEngineApp : SqlSugarBaseApp<SysCategoryType, SugarDbContext
                     Status = SqlFunc.IIF(i.Status == "Rejected", "Rejected", w.Status),
                     WorkStatus = i.Status,
                     CreateTime = i.CreateTime,
-                    InitiatorName = i.InitiatorName
+                    InitiatorName = i.InitiatorName,
+                    NodeType = n.NodeType
                 });
 
         // 分页查询