Retarget README to ReaSampler and current build targets; reconcile
CLAUDE.md repo-identity + targets table to reaper_reasampler; archive
Milestone 0 from PLAN.md into new COMPLETED.md.
PLAN.md: living 12-milestone roadmap from CONTEXT.md's build order,
each with a verify gate and its precision invariant; open questions
carried forward. TODO.md: near-term M0-M2 slice as ordered tasks.
daniel