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/EvidenceLocker/StellaOps.EvidenceLocker/StellaOps.EvidenceLocker.Worker/Program.cs

@@ -1,7 +1,10 @@
-using StellaOps.EvidenceLocker.Worker;
-
-var builder = Host.CreateApplicationBuilder(args);
-builder.Services.AddHostedService<Worker>();
-
-var host = builder.Build();
-host.Run();
+using StellaOps.EvidenceLocker.Infrastructure.DependencyInjection;
+using StellaOps.EvidenceLocker.Worker;
+
+var builder = Host.CreateApplicationBuilder(args);
+
+builder.Services.AddEvidenceLockerInfrastructure(builder.Configuration);
+builder.Services.AddHostedService<Worker>();
+
+var host = builder.Build();
+await host.RunAsync();