Servers were imported as computers (a PC type) so they show under PCs, not
Network. This one-shot re-points each server's asset in place - assetid is
unchanged, so comms/relationships/map/name/location/audit all carry over; only
the extension row is swapped (computers -> networkdevices), the asset type is
flipped, and the device gets the 'Server' networkdevicetype (created if absent).
Identify servers by their computer type name (--type, default 'Server'). Dry-run
by default; --commit applies. Run on the target instance.
