Contact List Event Notifications

One of the features of the new workspaces is the ability to define a contact list to receive notifications of events occurring in the workspace. This feature should be enhanced to allow workspace admins to select from a menu of events including dataset refresh failures, significant increases in query volume, requests for access to artifacts in the workspace, new datasets added to the workspace, and more. Ideally the admin would be able to associate different security groups or users with different event notifications. At a minimum, dataset refresh failures should be supported for group email notification.