Old packaged Desktop apps re-entering bootstrap against an existing
~/.hermes/hermes-agent were still passing the baked-in --commit pin, which
detached the managed checkout back to the app stamp (e.g. 0.15.1) after
hermes update had already moved it forward.
Skip the packaged commit pin when activeRoot already has git metadata;
keep branch args and fresh-install commit pinning unchanged. Port of
#59902 onto the post-ts-ify bootstrap-runner.ts.
Co-authored-by: helix4u <4317663+helix4u@users.noreply.github.com>
