generated from coulomb/repo-seed
Adds §12 'Known scaling risks & open problems' (O-1..O-7 with chosen direction + revisit trigger); renumbers §13-17. Refreshes §14 decisions (several earlier 'open' items now decided), §16 traceability (links the review + per-finding section map), and I-1..I-13. Flips SHARD-WP-0005 done. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>