Retrieve message delivery status

Use to check the persisted delivery state of one stored conversation message. Requires messages:read. messageId is the 24-character stored ID from list_conversation_messages or get_message_request_status, not externalMessageId, eventId, replyId or requestEventId. For an accepted send with no stored message yet, use get_message_request_status with its requestEventId. Returned deliveries describe individual provider parts when present; queued, partial_sent and unknown are not proof of complete delivery. This read does not send or retry anything.