Fix BuildStartedActivity overload

Author: rogeralsing

src/Proto.OpenTelemetry/OpenTelemetryHelpers.cs

@@ -27,7 +27,17 @@ public static void DefaultSetupActivity(Activity _, object __)
     )
     {
         var messageType = message.GetMessageTypeName();
-        return BuildStartedActivity(parent, source, verb, messageType, activitySetup, activityKind);
+
+        var name = $"Proto {source}.{verb} {messageType}";
+        var tags = new[] { new KeyValuePair<string, object?>(ProtoTags.MessageType, messageType) };
+        var activity = ActivitySource.StartActivity(name, activityKind, parent, tags);
+
+        if (activity is not null)
+        {
+            activitySetup(activity, message);
+        }
+
+        return activity;
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -94,4 +104,4 @@ public static PropagationContext ExtractPropagationContext(this MessageHeader he
 
     private static void AddHeader(List<KeyValuePair<string, string>> list, string key, string value) =>
         list.Add(new KeyValuePair<string, string>(key, value));
-}
+}