Adds the end-to-end assertion the version-stamp fix was really about: after
installing one platform, a different stale platform actually emits the
staleness warning on stderr (the behavior the over-stamping suppressed). Adds
the CHANGELOG entry closing #2694.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
install() called _refresh_all_version_stamps(), which stamped every installed
platform's .graphify_version with the current version WITHOUT rewriting that
platform's skill content — so a genuinely stale platform was stamped current
and its staleness warning was suppressed. Removes that bogus refresh; each
platform's stamp now advances only when its own content is (re)written via
_copy_skill_file, so a not-reinstalled stale platform correctly still warns.
Completes #2694 (part 1 shipped in 0.9.44 via #2753).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
