Create Client

The write body for one invoice client — create and full replace alike.

A client is editable at any time (nothing here is fiscally frozen the way an issued invoice is), so the update path replaces the whole record instead of patching: the dialog that collects it (AP-050) always holds every field, and a partial merge is how a cleared PEC survives an edit.

Identifiers are checked only for Italian clients: a German VAT number is neither a partita IVA nor a codice fiscale, and running either checksum on it would reject a perfectly valid customer. Foreign codes are length-and-alphabet bounded to what IdCodice accepts instead.

One stored client as the API returns it (details decrypted).

verified is tri-state and read-only (it is not on :class:ClientCreate — a client cannot declare itself verified): True the identifier is on file, False it is not, None nobody asked. The third case is ordinary — a registry outage, or a client with no Italian identifier to check — so a UI renders it as "unchecked", never as a failure.