Validation on embeds has interesting behavior. Embeds have a `timestamp`
property that is of type `Date`. However when providing a Date,
`WebhookExecuteSchema` silently ends the operation.

The resolution was to use strings and to annotate them with `//
@ts-expect-error`. This was not my first choice, but it was the best
option I saw.

The other option is to allow `Embeds` to pass strings as a timestamp but
I'd want a second opinion before making that change.