f2pool auto-detect + mixed-GPU per-card kernel/shape + per-card shape
refinements (4070 SUPER) + r256 perm restore to v2.1.8 + r512 TILE_PIPELINE
default-off. Hashrate table left at 4070S=129.4@220w (no fabricated delta).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>