增加领域事件定义，增加MassTransit 发布事件

IRaCIS.Core.Domain/BaseModel/DomainEvent.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace IRaCIS.Core.Domain.BaseModel
+{
+    /// <summary>
+    /// 领域实体事件基类
+    /// </summary>
+    public abstract class DomainEvent
+    {
+
+    }
+
+    public class FailedDomainEvent
+    {
+        public Guid Id { get; set; }
+        public string EventType { get; set; }
+        public string EventData { get; set; }
+        public DateTime FailedAt { get; set; }
+    }
+}