Move completed M2 (peaks module) from PLAN.md to COMPLETED.md; add peaks_tests
to the CLAUDE.md targets table and update the pure-core status to M0-M2 done.
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.