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/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Program.cs

@@ -2,7 +2,8 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
-using StellaOps.Notify.Engine;
+using StellaOps.AirGap.Policy;
+using StellaOps.Notify.Engine;
 using StellaOps.Notify.Queue;
 using StellaOps.Notify.Storage.Mongo;
 using StellaOps.Notifier.Worker.Options;
@@ -24,8 +25,10 @@ builder.Logging.AddSimpleConsole(options =>
 builder.Services.Configure<NotifierWorkerOptions>(builder.Configuration.GetSection("notifier:worker"));
 builder.Services.AddSingleton(TimeProvider.System);
 
-var mongoSection = builder.Configuration.GetSection("notifier:storage:mongo");
-builder.Services.AddNotifyMongoStorage(mongoSection);
+var mongoSection = builder.Configuration.GetSection("notifier:storage:mongo");
+builder.Services.AddNotifyMongoStorage(mongoSection);
+
+builder.Services.AddAirGapEgressPolicy(builder.Configuration);
 
 builder.Services.AddNotifyEventQueue(builder.Configuration, "notifier:queue");
 builder.Services.AddHealthChecks().AddNotifyQueueHealthCheck();