Search or list emails (v2)

Email search and listing across ALL of the authenticated user's connected mail accounts, fetched live from the providers (Google / Microsoft) — Dex stores no message content. Omit searchQuery to list newest-first; pass it to match subject, body, and participants as plain text (provider search operators are neutralized). folder=inbox restricts to received mail (the default spans the whole mailbox, including sent). Optional limit (default 25) and dateRange.{start,end} scope the window, defaulting to roughly the last 6 months; cursor (the previous response's pagination.nextCursor) continues a listing. Returns { data: { email_messages, pagination } } with sender, participants, subject, snippet, and a provider deep link per message.