I did really want to do this, but I'm so out of touch with Java dev and the Jenkins arch that I got really lost really fast, even after reviewing your plugin code. I'd definitely be interested in helping test and work on any of the actual implementation code that interfaces with Unity itself, but any of the Jenkins interaction stuff I feel I cannot do much on my own.
Hello Scott. Is this something you want to help contributing ? It shouldn't be hard.
I will be able to tackle this in some weeks, but haven't the need yet as my server isn't yet configured to use the workflows.