Missing events in admin logs

[SilasPeters]

As explained in #658, the logs in the admin page, which displays events like "person x enrolled for activity y", does not include all events.

658 suggests getting a new logger, so these issues go hand-in-hand, as getting a new logger might just as well solve it.

[Riscky]

I don't think that using a new logging library is going to magically solve the missing events. The logs are configured with the magic is_impressionable attribute on models and overwriting the impressions object , and I suppose we'll have to add that everywhere we want logs.