Extend Email service to include full attachments

Extend Email service to include full attachments

One of the problems with the Email service in TagoIO is that attachments are not really attachments - they end up as a link back to the Tago file (bucket) system.   This is potentially insecure and some organisations (e.g. local government) block such links.

I propose the Email service is extended to allow attachment of common Mime types, in particular TEXT, PDF, JSON.   When sending an email with a prepared 'attachment', the recipient would receive the attached file within the email using the appropriate MIME encoding.

Happy to discuss.
Gary