Same fix as the arr cleanup scripts today: find -printf gets file size
directly from find's own stat() during the walk (mtime already handled
by -mmin), and the dry-run log line's basename call is replaced with
parameter expansion. Header notes this can matter under real load --
"thousands of HLS segment files" per the existing lsof design principle
this mirrors, even though the ramdisk is empty right now (no active
transcode session to benchmark against directly).