- `make backend` replaces `make start`; polls postgres with nc (up to 10s)
instead of fixed sleep, kills any running uvicorn before starting fresh
- `make dashboard` kills any running observable preview before restarting
- Update all references in CLAUDE.md, README.md, SCOPE.md, state-hub/README.md,
and dashboard/src/docs/live-data.md
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>