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.

out/release/release.json

@@ -0,0 +1,19 @@
+{
+  "version": "2025.11.03-test",
+  "channel": "airgap",
+  "releaseDate": "2025-11-03",
+  "gitSha": "0000000000000000000000000000000000000000",
+  "components": [],
+  "charts": [],
+  "compose": [],
+  "debugStore": {
+    "manifest": "debug/debug-manifest.json",
+    "sha256": "d924d25e7b028105a1c7d16cb1d82955edf103a48571a253b474d8ee30a1b577",
+    "size": 340,
+    "generatedAt": "2025-11-03T21:56:23Z",
+    "artifactCount": 1
+  },
+  "checksums": {
+    "sha256": "72473433eb9cee20e848dd52212d10a2295158359d47c35b823d28de09858f59"
+  }
+}