Add tests for SBOM generation determinism across multiple formats

- Created `StellaOps.TestKit.Tests` project for unit tests related to determinism.
- Implemented `DeterminismManifestTests` to validate deterministic output for canonical bytes and strings, file read/write operations, and error handling for invalid schema versions.
- Added `SbomDeterminismTests` to ensure identical inputs produce consistent SBOMs across SPDX 3.0.1 and CycloneDX 1.6/1.7 formats, including parallel execution tests.
- Updated project references in `StellaOps.Integration.Determinism` to include the new determinism testing library.

docs/assets/ui/tours/README.md

@@ -1,13 +1,7 @@
-# UI Tours Media Assets
-
-Store annotated screenshots and GIFs referenced by `/docs/examples/ui-tours.md` in this directory. Use the naming convention documented in the guide (e.g., `triage-step-01.png`, `triage-flow.gif`).
-
-## Contribution checklist
-
-- Capture at 1920×1080 resolution unless otherwise specified.
-- Add annotations using the shared Docs Guild template (narrow callouts, numbered badges).
-- Optimize images to stay below 2 MB (PNG) and 8 MB (GIF) while preserving legibility.
-- Record GIFs at ≤30 seconds using 12–15 fps for balance between smoothness and size.
-- Update the capture checklist in `docs/examples/ui-tours.md` when assets are added or replaced.
-- Commit binaries using Git LFS if size exceeds repository limits; otherwise store directly.
-- Include the console build hash in the asset metadata or caption, matching the Downloads manifest version.
+# Archived: UI Tour Assets
+
+This directory previously contained draft UI tour capture notes/assets.
+
+It is intentionally kept only as a compatibility stub. For current Console guidance, see:
+
+- `docs/15_UI_GUIDE.md`