unconst/Affine-5czsc2fc98-r510-sbsv5-offline-dpo-hialpha-midrank-lobeta-midctx-ultraextrasteps-merged

R510 marsplan Offline-DPO merged salvage (TTL insurance; not a submission)

R510 Offline-DPO merged SKIP_LOCAL_TKC p3220 (not a submission)

initial commit