初步添加报警功能

DMS.Application/Interfaces/IAlarmService.cs

@@ -0,0 +1,20 @@
+using DMS.Application.DTOs;
+using DMS.Core.Events;
+
+namespace DMS.Application.Interfaces
+{
+    public interface IAlarmService
+    {
+        /// <summary>
+        /// 检查变量是否触发报警
+        /// </summary>
+        /// <param name="variable">变量DTO</param>
+        /// <returns>是否触发报警</returns>
+        bool CheckAlarm(VariableDto variable);
+        
+        /// <summary>
+        /// 警报事件
+        /// </summary>
+        event EventHandler<AlarmEventArgs> OnAlarmTriggered;
+    }
+}