Add indexable_content to the registered fields.
Add indexable_content to the registered fields.

Including this field means Panopticon has all the data it needs to
post the artefact to Rummager directly, rather than having to post an
amendment, which will fail if the item is not already in Rummager's
index.

alphagov/calendars,alphagov/calendars,ministryofjustice/calendars,ministryofjustice/calendars,alphagov/calendars,alphagov/calendars