Every fstab writer deduped on the exact line, so a stale entry for the
same mount point (e.g. the UUID of a pool that was since recreated)
survived forever. systemd-fstab-generator only creates one mount unit
per mount point and the FIRST line wins — if that line is stale, the
pool never mounts at boot, shows up as detached, and the user has to
re-import it every reboot (manual `mount -a` walks fstab sequentially,
so the import itself appeared to work).
All four writers (add-drive, create-pool, import-pool, jellyfin bind
mounts) now remove any existing entry for the target mount point
before appending the fresh line — idempotent and self-healing.
Also add a --version flag, stamped at build time via
-ldflags "-X main.version=...".
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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