nx_revimg_discover_gate.nx

nx_revimg_discover_gate.nx -- referee for the reverse-image cross-site discovery engine. Synthetic multi-site corpus (perceptual fingerprints with planted relationships -- no decode needed): site0 A (official): F1,F2 = the entity's seed media; F3,F4 = A's OTHER media. site1 B (fan repost): F1^3bits = a RECOMPRESSED copy of F1 (Hamming 3); F5 = B's other media; N1 = noise. site2 C (unrelated): U1,U2 -- nothing of the entity. site3 D: F5^3bits = a copy of F5 (reachable ONLY after F5 is harvested) ; F6. seeds R1 = {F1,F2}. copy_thresh = 6. row1 CROSS-SITE MATCH -- seed F1 is found on BOTH site0 (exact) and site1 (recompressed) = "what other sites have the media", robust to recompression a sha256 content-hash would miss. row2 HOST RANKING -- site A (hosts 2 seeds) outranks site B (1); unrelated C is never a host. row3 HARVEST -- site A's other media {F3,F4} and site B's {F5,N1} are harvested as NEW results. row4 GROW -- folding the harvest into the seeds discovers site D (via F5's copy): the host set grows 2 -> 3. The search results grew. row5 PRECISION -- unrelated site C is NEVER a host, before or after growth (no false growth). GREEN iff 5/5. Durable verdict -> knowledge/status/revimg_discover_gate.log. license_tier: ORIGINAL