Running the migration on a real machine with no cached sudo credentials
printed sudo's "a terminal is required to read the password" and still
exited 0. bin/omarchy-migrate writes the completion marker on a zero exit,
so the cleanup would have been recorded as done on every install that runs
migrations without a terminal, and never tried again.
Probe for elevation before the combined existence check and exit non-zero
when it fails, so the marker stays unwritten and the next run retries. The
probe is skipped when the directory is readable as-is, which is the case
when migrations run as root.
acrogenesis
80e7c25b37