- POOL_INTEGRATION.md: exact job/submit format, pool-side validation &
scoring on the SHA256D pow-hash, and a zero-downtime dual-accept rollout
plan (deploy dual-accept pool before announcing drg-xmrig).
- Restore doc/build/ docs removed during the initial copy.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
