Twice the build disk filled with 500+ GB of layers no image referenced,
pinned by mount records of containers the daemon no longer knew about,
while docker system df reported 90 GB. Nothing in docker can see them.
This walks imagedb/layerdb/mounts the way a fresh daemon would, reports
the stale set, and with --fix (daemon stopped) removes it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0182DhR1eFNPQyGmDrpHbedY