v3.1.2

Changed

• Docs and diagrams synced with the 3.1.x tree after a full audit
  (docs/maintenance/audit-2026-09-13.md): routing reads commands/*.md
  descriptions; agents are named by job name; phase vocabulary is
  Gather/Draft/Check/Cut over runtime Plan/Do/Check/Act; SVGs updated.

Removed

• translations/ (37 MB of translation PDFs shipped with every install),
  docs/RELEASE-v*.md, scripts/usage-tracker.sh, config/config.example.json,
  docs/demo.tape. Git history keeps them.
• Unused exports in hooks/lib/soul-observer.mjs (observation writers superseded
  by the MCP soul_record_observation tool), hooks/lib/state-boundary.mjs,
  and the unblock engine.