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/ui/branding.md

@@ -1,36 +1,5 @@
-# Console Branding Guide
+# Archived: Branding Guide
 
-> **Audience:** Console admins, UI Guild, Authority Guild.
-> **Scope:** Runtime branding of the Console UI (logo, title, and theme tokens).
-
-## 1. What can be customized
-- Header title text
-- Logo and favicon (SVG/PNG/JPG)
-- Theme tokens (light/dark/high-contrast CSS variables)
-- Welcome screen title and message (from config.json)
-
-## 2. Where branding is stored
-- Authority stores tenant branding records and serves them via `/console/branding`.
-- Updates are audited and require fresh-auth.
-
-## 3. Admin workflow
-1. Open **Console Admin -> Branding**.
-2. Upload logo and favicon (max 256KB).
-3. Adjust theme tokens using the palette editor.
-4. Preview changes (no persistence).
-5. Apply changes (requires fresh-auth).
-
-## 4. Offline workflow
-- Export branding bundle from the Admin panel.
-- Import via Authority offline bundle apply.
-- UI shows the applied branding hash for verification.
-
-## 5. Security and guardrails
-- Only whitelisted tokens are accepted.
-- No external CSS or remote font URLs are allowed.
-- Branding updates emit `authority.branding.updated` audit events.
-
-## 6. References
-- `docs/architecture/console-branding.md`
-- `docs/ui/admin.md`
+This page was consolidated during docs cleanup.
 
+- Canonical Console guide: `docs/15_UI_GUIDE.md`