Add determinism tests for verdict artifact generation and update SHA256 sums script

- Implemented comprehensive tests for verdict artifact generation to ensure deterministic outputs across various scenarios, including identical inputs, parallel execution, and change ordering.
- Created helper methods for generating sample verdict inputs and computing canonical hashes.
- Added tests to validate the stability of canonical hashes, proof spine ordering, and summary statistics.
- Introduced a new PowerShell script to update SHA256 sums for files, ensuring accurate hash generation and file integrity checks.

docs/technical/architecture/component-map.md

@@ -67,7 +67,7 @@ Concise descriptions of every top-level component under `src/`, summarising the
 - **Aoc** library (mentioned above) is reused by ingestion components and verification tooling to enforce the Aggregation-Only Contract. 
 
 ## How It All Connects
-High-level flows (see `docs/high-level-architecture.md` for diagrams):
+High-level flows (see `docs/40_ARCHITECTURE_OVERVIEW.md` for the 10-minute tour):
 1. **Ingest** — Concelier and Excititor use AOC to ingest advisories/VEX; Scheduler observes deltas. 
 2. **Scan & Evaluate** — Scanner generates SBOM evidence and hands to Signer/Attestor; Policy Engine merges SBOM, advisory, VEX, runtime signals; RiskEngine prioritises. 
 3. **Store & Export** — EvidenceLocker and Export Center package results; Registry serves artefacts; AirGap bundles offline editions.