9b96228775
OMP active-spin (#77) contends with GPU dispatch: skip the re-exec tuning when COLI_CUDA/COLI_METAL set. CPU-only path unchanged (no-op). Also gates the S==1 gate+up fusion behind COLI_NO_FUSED_PAIR — the fusion shifts FP accumulation order and collapses MTP acceptance (#163); default unchanged, opt-out available. Zac-validated on 6x5090 (0.41->1.29 tok/s).