What: Tighten file scope for meta workflow coder and checker roles.
Why: Meta workflow should only modify workflow code under
$HOME/.upulse/engine/src/workflows/, not arbitrary project files.
Changes:
- meta-coder-cursor.ts: add prompt constraint to only modify src/workflows/
- meta-checker.ts: restrict allowedPrefixes from src/docs/test/ to src/workflows/ only
- meta-checker.ts: remove blacklist exemption for src/workflows/
团子 🐰