clawdie chooses storage per host:
- FreeBSD: ZFS required (datasets under the pool)
- Linux with ZFS + a pool: datasets under the pool
- Linux without ZFS: plain-dir fallback, reporting ZFS benefits + spare disks
- --create-pool /dev/DEV runs `zpool create` (needs --pool NAME)
Pool creation is destructive and guarded: refused unless the disk is detected
empty (no partitions/filesystem/mount, not the root disk) or --force is given,
and only with --yes. `discover` lists block devices with candidacy. New
disk-candidacy parser + storage resolver are unit-tested (13 tests).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
