Separate _id for Channel Cancellations

This update is relevant to any POS or any integration which receives orders via Deliverect.

When a channel initiates a cancellation, the secondary order which we generate will no longer bear it's own unique _id but will match the _id of the original order.

The identifier of the original order will remain as the channelOrderId and the "status":100 confirms it's status as a cancellation request.

This allows for the streamlining of cancellations, both in API implementation and for customer's reporting and order management.

New format

The new format will send an _id for the order cancellation which matches the original like below;

{
    "_id": "6655bf36f231f2d853bca910",
    "channelOrderId": "TEST123",
    "status": 1,
...
}

{
    "_id": "6655bf36f231f2d853bca910",
    "channelOrderId": "TEST123",
    "status": 100,
...
}