Catalog

python -m catalog.build streams the product JSON, joins reliability + carbon CSVs, validates every row, FTS5 indexes names/ingredients/claims.

• ~17,500 products; Finnish compound search (maito → kevytmaitojuoma)
• Curated substitutes (~188) + similar-product fallback
• Allergen filters follow allergen-check strictness
• Gateway reads via catalog.db API: engine never opens the file