* fix(release): resolve previous tag by semver precedence, not publish order
GitHub's auto-detected previous tag for release notes ignores per-line
release branches, so out-of-order alpha/beta/hotfix tags can pull PRs
from an unrelated release into the notes. Compute the previous core@ tag
via real semver precedence instead, excluding a stable release's own
prereleases so it diffs against the prior stable release.
* fix(release): let ncipollo/release-action generate notes directly
Pass generateReleaseNotesPreviousTag to the release action instead of
calling GitHub's generate-notes API manually via curl - the action
already wraps the same endpoint with identical previous_tag_name
semantics, so this drops the redundant step.
kwburns-kong