* Fix bug with incorrectly set X-SVDX-HOSTNAME header value * Update Go to 1.21.5
* Add email header with SVDX public hostname so OCM/PCM knows where to check message status
* Add service version to health check endpoints response
Extend MessageStatus response with delivery deadline
* Direct delivery of emails through OCM agent * New Message Status endpoint
* Make didcomm connections bi-directional again, but define them as a triplet of senderDID, recipientDID and recipientEmail
* Change didcomm connections to represent one-way delivery path * Add Did-Connection-Id header to emails transported over didcomm * Try to fix the formatting of "Received" headers
* Add custom SMTP Received headers when SVDX processes emails * Describe new configuration options in README.md