Reduce file footprint of image_suggestions DAG via coalesce.
( Depends on repos/structured-data/image-suggestions!7 (merged), so marking as draft until that one is merged. )
We modify image_suggestions to accept a coalesce
varprop that, when set to 2
, reduces the file footprint of this job 80-fold. Details of implementation at repos/structured-data/image-suggestions!7 (merged).