Release notes

Goal

Produce accurate, scannable release notes (Markdown) for a specific release range.

Inputs to ask for (if missing)

• Release version + date (or "unreleased").
• Range to summarize: from_ref..to_ref (tags/SHAs/branches). If unknown, ask: "last release tag?" and "target branch/tag?"
• Target audience: end users, developers, internal ops, or all.
• What to include/exclude: internal refactors, dependency bumps, infra-only changes.