getEmail retrieves message content and the latest Resend delivery event.
automations/get-resend-email.automation.ts
emailId is returned by send actions. Optional account selects the
Resend binding and defaults to the project binding.
Returns id, object, from, to, cc, bcc, replyTo, subject, nullable
html and text, tags, createdAt, nullable scheduledAt, lastEvent, and
optional nullable provider messageId. lastEvent is a status string, not a
timestamp.