plom-push-to-canvas: report unpushed papers
@redpanda1234 @arechnitzer it would be good if the command line script contrib/plom-push-to-canvas.py
and flask-y alternatives reported any leftover papers that did NOT push to Canvas.
Likely, but not sure sure that such folks have z00123456
SIDs.
Also helpful, but somewhat out of scope would be a list of students on Canvas for which we did not upload a paper: insert Venn diagram here.