初步添加报警功能

DMS.Core/Enums/AlarmRule.cs

@@ -0,0 +1,30 @@
+namespace DMS.Core.Enums
+{
+    public enum AlarmRule
+    {
+        /// <summary>
+        /// 超过上限报警
+        /// </summary>
+        AboveMax,
+        
+        /// <summary>
+        /// 低于下限报警
+        /// </summary>
+        BelowMin,
+        
+        /// <summary>
+        /// 超出范围报警（同时检查上限和下限）
+        /// </summary>
+        OutOfRange,
+        
+        /// <summary>
+        /// 死区报警
+        /// </summary>
+        Deadband,
+        
+        /// <summary>
+        /// 布尔值变化报警
+        /// </summary>
+        BooleanChange
+    }
+}