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/roadmap/README.md

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+# Roadmap (detailed)
+
+This folder expands `docs/05_ROADMAP.md` into evidence-oriented guidance that stays valid even when timelines shift.
+
+Scheduling and staffing live outside the documentation layer; this roadmap stays date-free on purpose.
+
+## Documents
+- `docs/roadmap/maturity-model.md` — Capability maturity levels and the evidence expected at each level.
+
+## Canonical references by area
+- Architecture overview: `docs/40_ARCHITECTURE_OVERVIEW.md`
+- High-level architecture: `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- Offline posture and workflows: `docs/24_OFFLINE_KIT.md`, `docs/airgap/overview.md`
+- Determinism principles: `docs/key-features.md`, `docs/testing/connector-fixture-discipline.md`
+- Security boundaries and roles: `docs/security/scopes-and-roles.md`, `docs/security/tenancy-overview.md`