In couple of years, we hit quite a lot issues that were related to the fact that we
perform data manipulation in db:migration. This issues include:

1. problems with relying on columns in data that were added at the same run
and not being populated yet

2. problems with external systems needed to be ready as part of the data migration

The issue becomes even more visible when the migrations are run with more plugins
installed.

The goal for this issue is to find a better way to organize our data migrations
that would prevent us from hitting the issues we did in the past.