fix: replace remaining stale `/review-council` refs outside AGENTS.md

[yvonnedevlinrh]

Companion to #243. The uf. namespace migration (unbound-force/unbound-force#304) renamed /review-council → /uf.review-council, but stale references remain in several files that uf init does not manage (confirmed: the scaffold only writes embedded assets under .opencode/, so it cannot auto-fix these). #243 covers only AGENTS.md; this issue covers the rest.

Files to update

• .specify/memory/constitution.md (lines 10, 133) — highest-authority governance doc. Update to /uf.review-council. Requires a PATCH version bump (1.3.0 → 1.3.1) and follows the constitution's own amendment protocol.
• .opencode/skills/review-context/SKILL.md (line 19) — actively consumed by agents.
• docs/reference/cli/init.md — references old review-council.md scaffold filename (verify against current uf.review-council.md).
• .opencode/agents/cobalt-crush-dev.md — mentions /review-council.

Out of scope / exempt

• Spec artifacts under specs/017-testing-persona/ — historical planning records; leave as-is.
• AGENTS.md line 531 — historical changelog entry; exempt to preserve historical accuracy.

Acceptance Criteria

• Project-wide substring-safe grep for the old unprefixed command returns zero matches in actionable docs: rg -P '(?<!uf\.)/review-council' (excluding historical changelog/spec entries).
• Constitution version bumped to 1.3.1 with a Sync Impact Report entry.

Related

• Tracking umbrella: bug: AGENTS.md references old unprefixed command names after uf. namespace migratio unbound-force#454
• Root cause / tooling fix: bug: uf init does not remove old-name command files during uf. namespace migration unbound-force#419
• Namespace migration: chore: prefix uf-owned slash commands with uf. namespace unbound-force#304
• Sibling fix (AGENTS.md): fix: replace stale /review-council refs with /uf.review-council in AGENTS.md #243

This triage was performed by the Divisor review panel.