Local cross-encoder rerank: L6 vs L12 on our tiny labeled set (not the 74.30 table)

Canonical: Reranker pick: cross-encoder L6 vs L12 on eWorld.liveCheck date: 2026-09-26 PT · API spend $0 (CPU) We locked one bi-encoder (all-MiniLM-L6-v2, top-20) on a self-built 60-chunk OrbitDesk FA