changes(docs[release-notes]): Rewrite releases around deliverables

why: The changelog should follow the new CHANGES standard and explain each release in user-facing terms instead of mirroring PR mechanics.
what:
- Rework release entries into lead paragraphs, fixed sections, and deliverable headings
- Add richer links to issues, PRs, and live API docs while keeping retired APIs as inline code
- Correct recent release references and preserve historical entries without retagging

Author: tony