Enhance the kcli trace-smtp-server subcommand to report on deliveries

[tommairs]

What Operating System are you seeing this problem on?

Ubuntu 22

What Hardware is this system running?

Azure Standard D2

KumoMTA version

kumod 2023.10.06-97d8f24d

Did you try the latest release to see if the issue is better (or worse!) than your current version?

Yes, and I updated the version box above to show the version that I tried

Describe the bug

When you invoke kcli trace-smtp-server it traces inbound connections only. there is no tracing of outbound delivery conversations.

The current implementation of trace-smtp-server reports handshaking for inbound receptions, but does not trace outbound deliveries. While inbound receptions are probably the more valuable use case, testing and logging select deliveries can also be useful in debugging.

To Reproduce

Execute kcli trace-smtp-server and inject a message to see the reception. If the message is meant to relay, the corresponding delivery attempt is not traced.

Configuration

Irrelevant - this is an enhancement.

Expected Behavior

No response

Anything else?

No response