Move benefit to draft

Stock configuration of the benefit. When type is LIMITED the limited object is required; when type is UNLIMITED the limited object must be omitted or null.

Fixed points effect - adds a fixed amount of points to a card of the given card definition.

Proportional points effect - points are calculated from an order amount, order items, or a metadata property. Exactly one calculation source object (order, customer, custom_event, or order_items) is required, determined by calculation_type; the remaining source properties must be omitted or null.

Material benefit - a physical product or SKU. Exactly one of product or sku is required, matching the type; the other must be omitted or null.

Digital benefit - a reward sourced from a Voucherify campaign. Exactly one of gift_vouchers or discount_coupons is required, matching the type; the other must be omitted or null. The referenced campaign must exist and its campaign type must match the benefit's digital type.