fix(tracing): enrich client.address from remote ip

Author: winromulus

.claude/settings.local.json

@@ -24,7 +24,8 @@
       "Bash(dotnet tool uninstall:*)",
       "WebFetch(domain:gitversion.net)",
       "Bash(cat:*)",
-      "Bash(dotnet package:*)"
+      "Bash(dotnet package:*)",
+      "WebSearch"
     ],
     "deny": []
   }

src/ES.FX.Ignite/Configuration/AspNetCore/AspNetCoreTracingSettings.cs

@@ -8,4 +8,11 @@ public class AspNetCoreTracingSettings : TracingSettings
     ///     Gets or sets a value indicating whether ASP.NET Core tracing will filter out health checks requests
     /// </summary>
     public bool HealthChecksFiltered { get; set; } = true;
+
+    /// <summary>
+    ///     Gets or sets a value indicating whether the client address (client.address) tag should be set
+    ///     from the request's RemoteIpAddress. This ensures the correct client IP is reported when
+    ///     forwarded headers are used.
+    /// </summary>
+    public bool EnrichClientAddressFromRemoteIpAddress { get; set; } = true;
 }

src/ES.FX.Ignite/Hosting/IgniteHostingExtensions.cs

@@ -125,6 +125,14 @@ private static void AddOpenTelemetry(IHostApplicationBuilder builder, IgniteSett
                 o.Filter = context =>
                     !context.Request.Path.StartsWithSegments(settings.AspNetCore.HealthChecks.LivenessEndpointPath) &&
                     !context.Request.Path.StartsWithSegments(settings.AspNetCore.HealthChecks.ReadinessEndpointPath);
+
+            if (settings.AspNetCore.Tracing.EnrichClientAddressFromRemoteIpAddress)
+                o.EnrichWithHttpResponse = (activity, response) =>
+                {
+                    var clientAddress = response.HttpContext.Connection.RemoteIpAddress?.ToString();
+                    if (clientAddress is not null)
+                        activity.SetTag("client.address", clientAddress);
+                };
         });
     }