Keep-a-Changelog format, seeded with this PR's release: the pi harness
feature set, the control-image changes (Node 22, pi baked in), the additive
0015_model_harness migration, and a numbered rollout checklist (image order,
env, rollback, volume invariants) so the deployment strategy can be verified
against it after merge. README links to it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KdGv3u3DfTsP1S188KDhVH
Claude