AgentInbox v1.7.0

[1.7.0] - 2026-09-08

Added

• New email_mailbox builtin source type makes email a first-class source
  (#215): inbound mail arrives through UXC email transports (IMAP IDLE or
  Gmail/Graph/JMAP provider polling) and is normalized to
  email.message.received inbox items with routing-oriented metadata and
  attachment metadata; attachment payloads stay behind opaque retrieval
  handles and never enter inbox items.
• Email delivery operations send_text and reply_text (#215): outbound
  replies and new messages go through the UXC daemon email.send/email.reply
  RPC with proper In-Reply-To/References threading. SMTP and MIME handling stay
  in UXC; daemons without the email RPC return an explicit upgrade hint while
  inbound delivery keeps working.
• email source host type wiring across source hosting, routing, and docs
  (#215).