Scopes not being applied to Spans when using ASP.NET Core with OTel

[jamescrosswell]

This code:

app.MapGet("/hello", async context =>
{
   SentrySdk.ConfigureScope(scope =>
   {
       scope.AddBreadcrumb("Saying hello...");
       scope.SetTag("Greeting", "Hello");
       using var task = SampleTelemetry.ActivitySource.StartActivity("Greet");
       task?.SetTag("Answer", 42);
       Thread.Sleep(100); // simulate some work
   });


   await context.Response.WriteAsync("Hey bro!");
});

Creates this trace:

Neither the Tags nor the Breadcrumbs flow through to Sentry.

This is because the _hub being resolved here is a HubAdapter rather than a plain old Hub:

sentry-dotnet/src/Sentry.OpenTelemetry/SentrySpanProcessor.cs

Lines 195 to 198 in a448cc4

	if (activityScope is { } savedScope && _hub is Hub hub)
	{
	hub.RestoreScope(savedScope);
	}

So that logic for resolving the Hub needs to be improved.