Submit third-party web orders into Revel Systems and retrieve them via the web_order filter

Steps

1. Build a cart payload with establishmentId, an items array (product, quantity, price, modifieritems), orderInfo (customer, dining_option, pickup_time, asap, call_name), plus paymentInfo, serviceFees, and discounts as needed
2. POST the payload to the cart submit endpoint to create the order and receive the resulting order object
3. Retrieve web-originated orders later via GET on the Order resource with web_order=true, combined with has_items, closed, and limit/offset pagination as needed
4. Account for the optional call_number field added to the cart payload in a later release if your integration needs order call-out numbers
5. Confirm current support for modifier options (e.g. No/Lite/Side/Only) and split-tender payments against your account version, since these were added in later point releases