isothrum 2.1.5

Fixed

• A Compose run's update removes the anonymous volumes its recreate orphaned. 2.1.4 removed
  at down the anonymous volumes the containers still held; an update whose recreate makes new
  anonymous volumes for the new container (the Cyber CTF fixture lab's: three left after three
  updates, 2026-11-13) orphans the old ones at once, and no later down sees them attached. The
  update operation now records the containers' anonymous volumes before its steps and removes,
  after them, the recorded ones no container holds any more.