Webhook: Split the name.

Problem

While the interface captures First and Last name separately, Webhooks send the combined Full name instead.

This is a problem when sending the data to platforms that expect First & Last separately as now we need to figure out how to split the string.

Request

Send First name and Last name as separate fields in the Webhook payloads.

Not an issue to have First, Last and Full - Adding First and Last shouldn't break anything.