This is a milestone to capture Redshift artifacts which cannot yet be released to master. They cannot yet be released to master because we will break people's production Snowplow runs. This is because this milestone involves changes to Snowplow-hosted JSON Paths files. Users will get a mismatch between the version of a table they have in Redshift and the new JSON Paths file definition, through no fault of their own. We can release these schemas once we have an updated version of the Snowplow shred process which uses JSON Paths files which are hosted in Iglu and are tied to the version of a table that the user currently has installed in Redshift.