README: PP8/pipeline-parallel numbers documented

Published measured layout comparison: PP layouts prefill ~2x (no all-reduce; Gen2 x4 caps TP4 prefill ~1,700 tok/s) but lose deep decode vs TP4xPP2 (92 vs 130 @c64/512k). Third-party PP8 claims (117 single / 532 agg) use tokens/(last-first) + staggered arrivals and read higher than wall-clock.

When (PT)2026-09-11 19:21 PT

What was found

PP8 per-token KV is 2x TP4xPP2 because its pp_share relay replicates caches across ranks

raw JSON: /api/reports/23