feat: Increase logging around proxy conn

[jonstacks]

What

I was looking specifically for the client.addr and didn't see it being logged anywhere. We were previously logging this in the ngrok-operator project when we were handling dialing the upstream and joining connections on our own. Now that we are using an endpoint forwarder to clean up code in the ngrok-operator, we no longer see these logs messages when increasing log verbosity.

How

Inside handleProxy seemed like the most reasonable place to log this. It still feels like there might be a little bit of overlap with

ngrok-go/internal/tunnel/client/raw_session.go

Line 167 in 15e612c

s.Debug("tunnel Accept", "reqType", reqType, "remoteAddr", s.remoteAddr)

. However, we don't have the client.addr there, so we can't add it there.

I'm hoping this will be generally useful, but if we don't think it will be, we can close this.