feat(lmxproxy): phase 4 — host health monitoring, metrics, status web server

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Status/StatusModels.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+
+namespace ZB.MOM.WW.LmxProxy.Host.Status
+{
+    public class StatusData
+    {
+        public DateTime Timestamp { get; set; }
+        public string ServiceName { get; set; } = "";
+        public string Version { get; set; } = "";
+        public ConnectionStatus Connection { get; set; } = new ConnectionStatus();
+        public SubscriptionStatus Subscriptions { get; set; } = new SubscriptionStatus();
+        public PerformanceStatus Performance { get; set; } = new PerformanceStatus();
+        public HealthInfo Health { get; set; } = new HealthInfo();
+        public HealthInfo? DetailedHealth { get; set; }
+    }
+
+    public class ConnectionStatus
+    {
+        public bool IsConnected { get; set; }
+        public string State { get; set; } = "";
+        public string NodeName { get; set; } = "";
+        public string GalaxyName { get; set; } = "";
+    }
+
+    public class SubscriptionStatus
+    {
+        public int TotalClients { get; set; }
+        public int TotalTags { get; set; }
+        public int ActiveSubscriptions { get; set; }
+    }
+
+    public class PerformanceStatus
+    {
+        public long TotalOperations { get; set; }
+        public double AverageSuccessRate { get; set; }
+        public Dictionary<string, OperationStatus> Operations { get; set; }
+            = new Dictionary<string, OperationStatus>();
+    }
+
+    public class OperationStatus
+    {
+        public long TotalCount { get; set; }
+        public double SuccessRate { get; set; }
+        public double AverageMilliseconds { get; set; }
+        public double MinMilliseconds { get; set; }
+        public double MaxMilliseconds { get; set; }
+        public double Percentile95Milliseconds { get; set; }
+    }
+
+    public class HealthInfo
+    {
+        public string Status { get; set; } = "";
+        public string Description { get; set; } = "";
+        public Dictionary<string, string> Data { get; set; } = new Dictionary<string, string>();
+    }
+}