Add run message and report to webhook message

This does increase the message size, though I imagine that's marginal,
and is backwards compatible in that old keys remain in place and
aren't modified. The goal is to make the actual GHC app more set and
forget, and we can handle the errors with a little more discretion on
the webhook end.

GeoHealthCheck/notifications.py

@@ -215,6 +215,8 @@ def do_webhook(config, resource, run, status_changed, result):
         params['ghc.resource.title'] = resource.title
         params['ghc.resource.type'] = resource.resource_type
         params['ghc.resource.view'] = resource_view
+        params['ghc.run.message'] = run.message
+        params['ghc.run.report'] = run.report
 
         try:
             r = requests.post(url, params)