REA changelog update

Use this for release-note preparation and contributor attribution. Read docs/releasing.md from the repository root for publication authority and the existing checkpoint checks. This skill prepares notes; it does not authorize merging, tagging, or publishing.

Inventory before prose

Fetch complete history and tags. Select the published baseline tag from .release-please-manifest.json on the release PR's base branch, and pin that branch's exact SHA as the editorial target. REA tags are rea-agents-VERSION. Use the proposed version, including its prerelease suffix; do not change the always-bump-minor strategy to imitate OpenClaw's calendar versions.