Return one tour as an accounting document. The tour is the purchase order, so its purchase lines and totals appear once even when it serves several orders. Orders include only shipments on this tour. A shipment without a leg on this tour is omitted. A cancelled tour includes its fee; orders and shipments are included only for non-cancelled legs still attached to that tour, including a leg already marked Failed that remains attached. The updatedAt value tracks changes to the tour row; changes to related shipments, orders, carriers or documents do not update it.