Bug fixes and optimisations for the otel bridge

.gitignore

@@ -358,4 +358,7 @@ test/Elastic.Apm.Feature.Tests/SpecFlow/userid
 
 # Azurite
 __azurite_*
-__blobstorage__
+__blobstorage__
+
+# C# Dev Kit
+*.lscache

src/Elastic.Apm/AgentComponents.cs

@@ -65,7 +65,7 @@ internal AgentComponents(
 				// Initialize early because ServerInfoCallback requires it and might execute
 				// before EnsureElasticActivityStarted runs
 #if NET || NETSTANDARD2_1
-				ElasticActivityListener = new ElasticActivityListener(this, HttpTraceConfiguration);
+				ElasticActivityListener = new ElasticActivityListener(this);
 
 				// Ensure we have a listener so that transaction activities are created when the OTel bridge is disabled
 				if (!Configuration.OpenTelemetryBridgeEnabled && !Transaction.ElasticApmActivitySource.HasListeners())
@@ -251,7 +251,7 @@ internal static IApmLogger GetGlobalLogger(IApmLogger fallbackLogger, LogLevel a
 		}
 
 #if NET || NETSTANDARD2_1
-		private ElasticActivityListener ElasticActivityListener { get; }
+		internal ElasticActivityListener ElasticActivityListener { get; }
 #endif
 
 		internal ICentralConfigurationFetcher CentralConfigurationFetcher { get; }

src/Elastic.Apm/DiagnosticListeners/KnownListeners.cs

@@ -15,7 +15,7 @@ internal static class KnownListeners
 		public const string SystemNetHttpDesktopHttpRequestOut = "System.Net.Http.Desktop.HttpRequestOut";
 		public const string ApmTransactionActivityName = "ElasticApm.Transaction";
 
-		public static HashSet<string> SkippedActivityNamesSet =>
+		public static readonly HashSet<string> SkippedActivityNamesSet =
 		[
 			MicrosoftAspNetCoreHostingHttpRequestIn,
 			SystemNetHttpHttpRequestOut,