Email UUID
curl https://api.usenaive.ai/v1/email/email-uuid \
-H "Authorization: Bearer nv_sk_live_..."
{
"id": "uuid",
"from": "someone@external.com",
"to": "research@acme-corp.ai",
"subject": "Re: Research findings",
"body": "Full email body text...",
"received_at": "2026-05-02T10:30:00Z"
}