refs https://github.com/TryGhost/Team/issues/1053
This table is going to be completely deleted at some point in the
future. It serves as a persistent datastore for a spike into collection
analytic events for members. We've opted for a generic table, rather
than a table for each event, so that we can push the DB to the limit in
terms of the length of the table, and find out performance issues A$AP
