Enqueue new container repository twice

Problem

We would like to speed up the phase 2 registry migration. We have a capacity set at 25, but we don't seem to be hitting that capacity.

Solution

Let's try queuing twice on every import-finalized action! To avoid deduplication we should do a perform_async and perform_in(2.seconds).

The 2nd perform should live behind a feature flag so we can control this change.