Improvements for execution context

Today, the execution context requires:

    {
        "Payload": {
            "AppKey": "",
            "data-partition-id": "partition"
        },
        "id_token": "",
        "persistent_id": "filename.vds",
        "vds_url": "sd://partition/sub-project",
        "work_product_id": "",
        "file_record_id": ""
    }

This could be simplified to only require work_product_id and file_record_id as all the information needed is present in those records.

Suggested new execution context:

    {
        "data-partition-id": "partition",
        "work_product_id": "",
        "file_record_id": ""
    }

The persistent_id would be generated similar to what the SEG-Y to ZGY DAG does: Output file path will be generated from the input: insert a GUID after the file name, replace .sgy extension with .vds.

Note, this removes the need for id_token