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/StellaOps.Scheduler.WebService.csproj

@@ -9,6 +9,7 @@
     <ProjectReference Include="../__Libraries/StellaOps.Scheduler.Models/StellaOps.Scheduler.Models.csproj" />
     <ProjectReference Include="../__Libraries/StellaOps.Scheduler.Storage.Mongo/StellaOps.Scheduler.Storage.Mongo.csproj" />
     <ProjectReference Include="../__Libraries/StellaOps.Scheduler.ImpactIndex/StellaOps.Scheduler.ImpactIndex.csproj" />
+    <ProjectReference Include="../__Libraries/StellaOps.Scheduler.Queue/StellaOps.Scheduler.Queue.csproj" />
     <ProjectReference Include="../../__Libraries/StellaOps.Plugin/StellaOps.Plugin.csproj" />
     <ProjectReference Include="../../Authority/StellaOps.Authority/StellaOps.Auth.Abstractions/StellaOps.Auth.Abstractions.csproj" />
     <ProjectReference Include="../../Authority/StellaOps.Authority/StellaOps.Auth.ServerIntegration/StellaOps.Auth.ServerIntegration.csproj" />