docs consolidation and others

docs/product/roadmap/README.md

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+# Roadmap (detailed)
+
+This folder expands `docs/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/ARCHITECTURE_OVERVIEW.md`
+- High-level architecture: `docs/ARCHITECTURE_OVERVIEW.md`
+- Offline posture and workflows: `docs/OFFLINE_KIT.md`, `docs/modules/airgap/guides/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`