Store last_eventful_visit_date
Summary:
last_eventful_visit_date is a good candidate for sorting options and filters.
These changes will store this value in ES when OriginVisitStatus objects are received
by the swh.search journal client.
Reviewers: Reviewers, vsellier
Reviewed By: Reviewers, vsellier
Subscribers: vlorentz, vsellier
Differential Revision: https://forge.softwareheritage.org/D5878