List invoices

Returns a paginated list of invoices for the authenticated organisation, sorted by issue date, most recent first. Filter by type, status, contact, or date range.

The response includes summary statistics: draftCount, sentCount, overdueCount (invoices past their due date that are not paid, cancelled, or written off, whatever their stored status), and outstandingTotal (the unpaid amount across those overdue invoices, in pence).