Ignore 90% of project config traces

Author: ejsmith

src/Exceptionless.Web/ApmExtensions.cs

@@ -94,6 +94,13 @@ public static IHostBuilder AddApm(this IHostBuilder builder, ApmConfig config)
                         if (config.MinDurationMs > 0 && activity.Duration < TimeSpan.FromMilliseconds(config.MinDurationMs))
                             return false;
 
+                        if (activity.GetTagItem("http.route") is string httpRoute)
+                        {
+                            // only capture 10% of config requests
+                            if (httpRoute == "api/v2/projects/config")
+                                return Random.Shared.Next(100) > 90;
+                        }
+
                         if (activity is { DisplayName: "LLEN", Parent: null })
                             return false;