Add initial support for tracing

src/NScenario/NScenario.csproj

@@ -21,6 +21,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.1" />
     <PackageReference Include="System.Text.Json" Version="8.0.0" />
   </ItemGroup>
   <ItemGroup>

src/NScenario/StepExecutors/InstrumentationScenarioStepExecutor.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Diagnostics;
+using System.Threading.Tasks;
+
+namespace NScenario.StepExecutors;
+
+public static class NScenarioInstrumentation
+{
+    public static ActivitySource DiagnosticSource = new ActivitySource("NScenario");
+}
+
+public class InstrumentationScenarioStepExecutor : IScenarioStepExecutor
+{
+    private readonly IScenarioStepExecutor _scenarioStepExecutorImplementation;
+
+
+    public InstrumentationScenarioStepExecutor(IScenarioStepExecutor scenarioStepExecutorImplementation)
+    {
+        _scenarioStepExecutorImplementation = scenarioStepExecutorImplementation;
+    }
+
+    public async Task Step(string scenarioName, string stepDescription, Func<Task> action, StepContext stepContext)
+    {
+        using var activity = NScenarioInstrumentation.DiagnosticSource.StartActivity(name: stepDescription);
+        await _scenarioStepExecutorImplementation.Step(scenarioName, stepDescription, action, stepContext);
+    }
+
+    public async Task Step(string scenarioName, string stepDescription, Action action, StepContext stepContext)
+    {
+        using var activity = NScenarioInstrumentation.DiagnosticSource.StartActivity(name: stepDescription);
+        await _scenarioStepExecutorImplementation.Step(scenarioName, stepDescription, action, stepContext);
+    }
+}

src/NScenario/TestScenarioFactory.cs

@@ -88,6 +88,7 @@ private static IScenarioStepExecutor BuildScenarioStepExecutor(IScenarioOutputWr
             stepExecutorBuilder.WrapWith(u => new IndentionScenarioStepExecutor(u));
             stepExecutorBuilder.WrapWith(u => new PrefixedScenarioStepExecutor(u, scenarioPrefix, stepPrefix));
             stepExecutorBuilder.WrapWith(u => new OrderedScenarioStepExecutor(u));
+            stepExecutorBuilder.WrapWith(u => new InstrumentationScenarioStepExecutor (u));
             var stepExecutor = stepExecutorBuilder.Build();
             return stepExecutor;
         }