Non-public site visibility change should update all related site activity visibility to hidden
If a Commons site changes their site visibility from public to a non-public option (under "Settings > Reading" in the admin dashboard), we should update all related activity data for blog posts and comments so they are hidden sitewide as well.
Should also write a script to handle existing blog activity to see which ones might need to be hidden. This might take awhile to run. A quick count query for blog post activity across all subdomain sites is ~65,000. For blog comments, that number is ~39,000.