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/Scanner/__Tests/StellaOps.Scanner.Analyzers.Lang.Tests/Lang/Ruby/RubyLanguageAnalyzerTests.cs

@@ -9,11 +9,12 @@ public sealed class RubyLanguageAnalyzerTests
     [Fact]
     public async Task GemfileLockProducesDeterministicInventoryAsync()
     {
-        var fixture = TestPaths.ResolveFixture(lang, ruby, basic);
-        var golden = Path.Combine(fixture, expected.json);
+        var fixture = TestPaths.ResolveFixture("lang", "ruby", "basic");
+        var golden = Path.Combine(fixture, "expected.json");
         await LanguageAnalyzerTestHarness.AssertDeterministicAsync(
             fixture,
             golden,
-            new ILanguageAnalyzer[] { new RubyLanguageAnalyzer() });
+            new ILanguageAnalyzer[] { new RubyLanguageAnalyzer() },
+            cancellationToken: TestContext.Current.CancellationToken);
     }
 }