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/AdvisoryAI/StellaOps.AdvisoryAI.Worker/Program.cs

@@ -0,0 +1,20 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using StellaOps.AdvisoryAI.Caching;
+using StellaOps.AdvisoryAI.DependencyInjection;
+using StellaOps.AdvisoryAI.Queue;
+using StellaOps.AdvisoryAI.Worker.Services;
+
+var builder = Host.CreateApplicationBuilder(args);
+
+builder.Services.AddMetrics();
+builder.Services.AddAdvisoryPipeline(options => builder.Configuration.GetSection("AdvisoryAI:Pipeline").Bind(options));
+builder.Services.AddAdvisoryPipelineInfrastructure();
+
+builder.Services.Configure<AdvisoryPlanCacheOptions>(builder.Configuration.GetSection("AdvisoryAI:PlanCache"));
+builder.Services.Configure<AdvisoryTaskQueueOptions>(builder.Configuration.GetSection("AdvisoryAI:TaskQueue"));
+
+builder.Services.AddHostedService<AdvisoryTaskWorker>();
+
+var host = builder.Build();
+await host.RunAsync();