fix: track HTTP request stats for all monitoring endpoints

src/NATS.Server/Monitoring/MonitorServer.cs

@@ -14,7 +14,7 @@ public sealed class MonitorServer : IAsyncDisposable
     private readonly WebApplication _app;
     private readonly ILogger<MonitorServer> _logger;
 
-    public MonitorServer(NatsServer server, NatsOptions options, ILoggerFactory loggerFactory)
+    public MonitorServer(NatsServer server, NatsOptions options, ServerStats stats, ILoggerFactory loggerFactory)
     {
         _logger = loggerFactory.CreateLogger<MonitorServer>();
 
@@ -27,26 +27,75 @@ public sealed class MonitorServer : IAsyncDisposable
 
         var varzHandler = new VarzHandler(server, options);
 
-        _app.MapGet(basePath + "/", () => Results.Ok(new
+        _app.MapGet(basePath + "/", () =>
         {
-            endpoints = new[]
+            stats.HttpReqStats.AddOrUpdate("/", 1, (_, v) => v + 1);
+            return Results.Ok(new
             {
-                "/varz", "/connz", "/healthz", "/routez",
-                "/gatewayz", "/leafz", "/subz", "/accountz", "/jsz",
-            },
-        }));
-        _app.MapGet(basePath + "/healthz", () => Results.Ok("ok"));
-        _app.MapGet(basePath + "/varz", async () => Results.Ok(await varzHandler.HandleVarzAsync()));
+                endpoints = new[]
+                {
+                    "/varz", "/connz", "/healthz", "/routez",
+                    "/gatewayz", "/leafz", "/subz", "/accountz", "/jsz",
+                },
+            });
+        });
+        _app.MapGet(basePath + "/healthz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/healthz", 1, (_, v) => v + 1);
+            return Results.Ok("ok");
+        });
+        _app.MapGet(basePath + "/varz", async () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/varz", 1, (_, v) => v + 1);
+            return Results.Ok(await varzHandler.HandleVarzAsync());
+        });
 
         // Stubs for unimplemented endpoints
-        _app.MapGet(basePath + "/routez", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/gatewayz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/leafz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/subz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/subscriptionsz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/accountz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/accstatz", () => Results.Ok(new { }));
-        _app.MapGet(basePath + "/jsz", () => Results.Ok(new { }));
+        _app.MapGet(basePath + "/connz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/connz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/routez", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/routez", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/gatewayz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/gatewayz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/leafz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/leafz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/subz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/subz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/subscriptionsz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/subscriptionsz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/accountz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/accountz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/accstatz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/accstatz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
+        _app.MapGet(basePath + "/jsz", () =>
+        {
+            stats.HttpReqStats.AddOrUpdate("/jsz", 1, (_, v) => v + 1);
+            return Results.Ok(new { });
+        });
     }
 
     public async Task StartAsync(CancellationToken ct)

src/NATS.Server/Monitoring/VarzHandler.cs

@@ -47,9 +47,6 @@ public sealed class VarzHandler
                 _lastCpuUsage = currentCpu;
             }
 
-            // Track HTTP request count for /varz
-            stats.HttpReqStats.AddOrUpdate("/varz", 1, (_, v) => v + 1);
-
             return new Varz
             {
                 Id = _server.ServerId,

src/NATS.Server/NatsServer.cs

@@ -65,7 +65,7 @@ public sealed class NatsServer : IMessageRouter, ISubListAccess, IDisposable
 
         if (_options.MonitorPort > 0)
         {
-            _monitorServer = new MonitorServer(this, _options, _loggerFactory);
+            _monitorServer = new MonitorServer(this, _options, _stats, _loggerFactory);
             await _monitorServer.StartAsync(ct);
         }