nx_food_provenance.nx

nx_food_provenance.nx -- LIB: the LICENSE / PROVENANCE + ANTI-BRO-SCIENCE layer for the Nishi food branch (operator: "ingest recipes that aren't copyrighted or otherwise flagged to a person ... uses research not bro science"). Three guarantees, all data-driven (seg-store, no TSV) and FAIL-CLOSED by construction: 1. ADMISSIBILITY GATE -- fd_source_admissible: only explicitly-admissible licenses pass (PD, CC0, CC-BY, CC-BY-SA, ODbL, US-Gov, or pure non-copyrightable FACTS = ingredient lists/ratios). Copyrighted (ARR), personal/flagged, AND unknown licenses are REFUSED. Recipe FACTS are not copyrightable (17 USC 102(b)); creative prose is -- so we ingest the facts, never the prose, never a person's flagged data. 2. FACTS-ONLY INGESTION -- fd_ingest_recipe: writes ingredient co-occurrence facts (food:eob:<a>:<b>), never names/headnotes/prose. Refuses inadmissible sources LOUD (returns 0). 3. ANTI-BRO-SCIENCE -- fd_sci_cited: every food-science rule (food:sci:<id>) carries a CITE naming a real fetched research source (knowledge/fetched/<cite>.raw); a rule whose source is absent is NOT grounded. Reuses nx_food_science (fd_field/fd_atoi/fd_seg_next/fd_streq_store + ss_*/as_*). license_tier: ORIGINAL