resolve_job_compose_file() used Path(stack).parent.parent for the
internal fallback, which resolved to data/stacks/compose-jobs/ instead
of data/compose-jobs/. This meant deploy create couldn't find job
compose files for internal stacks, so they were never copied to the
deployment directory and never created as k8s Jobs.
Use the same data directory resolution pattern as resolve_compose_file.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>