* feat(release): commit version files back to branch for one-version-everywhere
Add @semantic-release/git to the release plugin chain so the bumped
package.json, release-policy.json, and packages/cli/package.json land
back on the release branch after publish. This keeps the published npm
version and the in-repo version files in sync, so local builds from
main report the released version (e.g. ktx --version and the daemon
/health endpoint via KTX_DAEMON_VERSION).
Also widens assertPublicNpmReleaseTag to accept branch-<sanitized> tags,
unblocking branch RC publishes that pass through update-public-release-
version.mjs.
* test(release): pin GITHUB_REF_NAME in main-rc releaseTag assertion
The bare releaseTag('rc') call defaulted to process.env.GITHUB_REF_NAME,
which on PR CI is the merge ref (e.g. 186/merge) and yields
'branch-186-merge' instead of 'next'. Pass an explicit { GITHUB_REF_NAME:
'main' } so the test exercises the main-rc path regardless of CI env.