- distribute_extraction.py: add gremlin_escape() for special chars,
add --batch-size async mode with submitAsync()
- load_cornfield.py: pipe SQL via stdin to avoid shell metachar issues
- populate_ene_tables.py: same stdin pipe fix for neon SSH calls
Add concept extraction/orchestration scripts under scripts/ and infra
metadata in infra.json. Generated extraction outputs live under extraction/
and are regenerated from scripts; add extraction/ to .gitignore.
