add span for dnx confirmation

Author: baronfel

src/Cli/dotnet/InteractiveConsole.cs

@@ -4,6 +4,7 @@
 using System.CommandLine;
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.DotNet.Cli.Commands;
+using Microsoft.DotNet.Cli.Utils;
 
 namespace Microsoft.DotNet.Cli;
 
@@ -30,6 +31,8 @@ public static class InteractiveConsole
             return null;
         }
 
+        using var _ = Activities.Source.StartActivity("confirm-run-from-source");
+
         Console.Write(AddPromptOptions(message));
 
         while (true)