Docs-only. Documents that the OMP active-spin steals SoC power from the Metal GPU on Apple Silicon (default regresses -39%); COLI_NO_OMP_TUNE=1 + PIPE=1 recovers and beats the pre-rebase branch (2.24 vs 2.06 tok/s). Flags a follow-up: Metal builds should default to passive OMP wait.
RDouglas