Storage Share Fixes: Placement and Snapshot Restore

What's changed

• New Storage Share instances, those created from 27 September 2026, are no longer limited to a single server: they can run on any eligible server. Before, a new instance could stay in Provisioning because that one server had no room left, even for the smallest plan
• Instances created before 27 September stay where they are, because their data lives there
• Restoring a Storage Share from a snapshot used to wait for the new volumes to become ready, which could not happen while the instance was stopped, so the restore timed out and was marked failed. The restored volumes are now created on the server that holds the snapshot