SFTP uses a virtual root where Synology shared folders appear directly
under / — /volume1/... does not exist in SFTP space. The repo lives at
/homes/jared/Backups/fedora-workstation, not /home/Backups/... .
Also removes the pre-flight reachability check (HTTP curl, previously SSH)
that has been the source of every Synology skip since May 24. Restic
handles unreachable SFTP endpoints gracefully; no gate needed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Check that /volume1/backup is actually reachable and readable, rather
than just testing SSH connectivity. This prevents false positives where
SSH works but the backup destination is offline or unmounted.
jared