Clearer release notes

Consolidate and clarify release notes in 1.0.7

Version 1.0.7 adds the package version and a short change description to release-note titles alongside their date and commit hash. The next upgrade also enriches existing generated titles while preserving edited titles, post content, excerpts, and publication dates.

Release Notes now has one public destination at /release-notes. Navigation, breadcrumbs, home-page links, and the sitemap use the consolidated destination. Older Site Updates and nested release-note URLs redirect to the matching page or post, including pagination links.

Post previews now show an explicit see more link, and generated release excerpts stop at complete words. These changes and the historical-title update are installed through the normal upgrade button; no manual VPS changes are needed for this release.