fix(ci): create GitHub releases on the dispatched v-prefixed tag
The create_release job passed the bare version (v stripped) as the
release tag with no commit target, so when that tag did not exist
GitHub minted a new lightweight tag at the default-branch HEAD -- the
wrong commit, still carrying the previous version (main only adopts a
release's version via the post-release back-merge). Every release since
1.8.2 shipped a stray bare tag (1.8.2, 1.8.3, 1.9.0-1.9.6, 1.10.0)
pointing at a previous-version commit, and the GitHub release had to be
manually re-pointed to the real vX.Y.Z tag after each release.
- create_release now attaches the release to inputs.release_tag for
stable releases; pre-releases keep their computed tag (e.g.
1.10.0rc1) but it is minted at the release commit via 'commit:'.
- release-lfx.yml pins the minted lfx-v* tag to github.sha instead of
the default branch.
The validate-tag-format guard (#12847) only blocks at dispatch time;
create_release was re-creating the very duplicates it guards against.
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