I ended up with minutes-long open transactions in the database in prod
which was causing outtages. This is because I thought transactions were
basically free, which is a terrible thing to think. Instead we'll just
open them when we need them.
This adds a bunch of stuff, including setting the organization's Lob
sender address ID, inserting mailer/compliance_report relationships,
adding external id from Lob (or maybe some other provider) and
attempting to load up the pool feature for a site.
