nx_probiome_provenance.nx

nx_probiome_provenance.nx -- R6d grounding: "research not bro science". Maps each nx_probiome cite_id (1..22) to the REAL source file the Nishi researcher fetched (nx_probiome_research_fetch -> knowledge/fetched/ probiome_c<NN>_*.raw) and proves the file genuinely landed: it must be at least PG_MIN_SOURCE_BYTES, so a 404 error page (~48 KB here) can NEVER masquerade as a citation. This is the honest counterpart of the food branch's nx_food_ground_gate ("N science rules cited to real fetched sources"). Absolute paths (cwd-independent: the native-lane gate runs from bench/, the researcher wrote from nxc2/, so a relative path would diverge). genealogy_id: nishi_food_ground_gate + rule4_verified_facts_not_assumptions