Add unit tests for SBOM ingestion and transformation

- Implement `SbomIngestServiceCollectionExtensionsTests` to verify the SBOM ingestion pipeline exports snapshots correctly.
- Create `SbomIngestTransformerTests` to ensure the transformation produces expected nodes and edges, including deduplication of license nodes and normalization of timestamps.
- Add `SbomSnapshotExporterTests` to test the export functionality for manifest, adjacency, nodes, and edges.
- Introduce `VexOverlayTransformerTests` to validate the transformation of VEX nodes and edges.
- Set up project file for the test project with necessary dependencies and configurations.
- Include JSON fixture files for testing purposes.

src/Scheduler/StellaOps.Scheduler.WebService/Program.cs

@@ -18,8 +18,9 @@ using StellaOps.Scheduler.WebService.GraphJobs;
 using StellaOps.Scheduler.WebService.GraphJobs.Events;
 using StellaOps.Scheduler.WebService.Schedules;
 using StellaOps.Scheduler.WebService.Options;
-using StellaOps.Scheduler.WebService.Runs;
 using StellaOps.Scheduler.WebService.PolicyRuns;
+using StellaOps.Scheduler.WebService.PolicySimulations;
+using StellaOps.Scheduler.WebService.Runs;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -84,6 +85,8 @@ if (storageSection.Exists())
     builder.Services.AddSchedulerMongoStorage(storageSection);
     builder.Services.AddSingleton<IGraphJobStore, MongoGraphJobStore>();
     builder.Services.AddSingleton<IPolicyRunService, PolicyRunService>();
+    builder.Services.AddSingleton<IPolicySimulationMetricsProvider, PolicySimulationMetricsProvider>();
+    builder.Services.AddSingleton<IPolicySimulationMetricsRecorder>(static sp => (IPolicySimulationMetricsRecorder)sp.GetRequiredService<IPolicySimulationMetricsProvider>());
 }
 else
 {
@@ -117,6 +120,12 @@ builder.Services.AddOptions<SchedulerOptions>()
     .Bind(builder.Configuration.GetSection("Scheduler"))
     .PostConfigure(options => options.Validate());
 
+builder.Services.AddSingleton<IQueueLagSummaryProvider, QueueLagSummaryProvider>();
+builder.Services.AddSingleton<IRunStreamCoordinator, RunStreamCoordinator>();
+builder.Services.AddSingleton<IPolicySimulationStreamCoordinator, PolicySimulationStreamCoordinator>();
+builder.Services.AddOptions<RunStreamOptions>()
+    .Bind(builder.Configuration.GetSection("Scheduler:RunStream"));
+
 var pluginHostOptions = SchedulerPluginHostFactory.Build(schedulerOptions.Plugins, builder.Environment.ContentRootPath);
 builder.Services.AddSingleton(pluginHostOptions);
 builder.Services.RegisterPluginRoutines(builder.Configuration, pluginHostOptions);
@@ -196,6 +205,7 @@ app.MapGraphJobEndpoints();
 app.MapScheduleEndpoints();
 app.MapRunEndpoints();
 app.MapPolicyRunEndpoints();
+app.MapPolicySimulationEndpoints();
 app.MapSchedulerEventWebhookEndpoints();
 
 app.Run();