nx_evidence_audit.nx

nx_evidence_audit.nx -- THE FLEET GROUNDING AUDIT: walk knowledge/compare/, and for EVERY head-to-head census (<domain>.matrix) FORK nx_swcompare_evidence in json mode and roll up how many present claims LACK a real source line (ungrounded = a fabricated/broken cell). This is the autonomous liar-catch: it is what found videocodec's vv_enc_rct8 pointing at the wrong organ (2026-07-12). Exit 0 iff the whole surface is clean (0 ungrounded), else RED naming each offending domain. Distinct from nx_evidence_fleet (that rolls up which domains HAVE a .gates file; this one RUNS the grounding check on every claim). ⚠COORDINATION: fold this into nx_evidence_fleet as an `audit` mode once that file's churn settles (it is a sibling's hot file today). Read-only except /tmp scratch. license_tier: ORIGINAL expect_exit: 0