User story
As member of the Growth team I want to be able to provide users with unillustrated articles, concerning topics they're interested in, that have image suggestions. In order to do this we need to populate the search indices of the relevant wikis with a flag that indicates whether an article has a suggested image.
When T299789 is done, we'll have a list of unillustrated articles with suggestions stored in hdfs
This ticket is to transform this data into a set of flags indicating which articles on a wiki have suggestions, in a format similar to the data format used in T302095 so it can be imported by Search's data pipeline
The relevant flag is recommendation.image, which should have a value of exists|1 in weighted_tags if an article has a suggestion. If it doesn't then recommendation.image should not appear in weighted_tags