ALM-625 temporarily disable background jobs
ALM-625 trigger article import
ALM-625 update status cache after importing articles
ALM-625 fix small error in expire_cache
ALM-681 only store canonical_url that contains at least one number
ALM-625 handle ActiveRecord::RecordNotUnique errors when importing articles
ALM-681 use status code 404 when resolving DOI to incorrect page