optimize the subscription migration
optimize the subscription migration

cache as much as possible to reduce the load on the target db
zooniverse/Panoptes,zooniverse/Panoptes,srallen/Panoptes,rogerhutchings/Panoptes,camallen/Panoptes,srallen/Panoptes,parrish/Panoptes,rogerhutchings/Panoptes,astopy/Panoptes,astopy/Panoptes,parrish/Panoptes,camallen/Panoptes,camallen/Panoptes,astopy/Panoptes,rogerhutchings/Panoptes,rogerhutchings/Panoptes,srallen/Panoptes,srallen/Panoptes,parrish/Panoptes,edpaget/Panoptes,zooniverse/Panoptes,zooniverse/Panoptes,parrish/Panoptes,edpaget/Panoptes,edpaget/Panoptes,camallen/Panoptes,astopy/Panoptes,edpaget/Panoptes