The free-space and full-disk paths each carried verbatim copies of the
T2 Mac kernel detection, the credentials JSON heredoc, the identity/
encryption answer files, the dry-run print-and-cleanup block, and the
udev settle loops. Pull those into detect_kernel, write_user_files,
print_dry_run_files, and wait_for_device, which also removes a subtle
rm vs rm -f drift between the two dry-run cleanups.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
