A width whose variant would be taller than the thumbnailer's 4096 px
edge limit is skipped with a warning and counted, like a width wider
than the original, so the job and journal:image-variants go on with the
next widths and images.
- golem15_journal_image_variants (migration 202610280002): a thumbnail
per width of golem15.journal.image_widths (480, 800, 1200 by default,
never wider than the original) and its WebP copy, with the original's
size
- conga job golem15.journal.image_variants (three attempts), queued after
a featured image upload and after an admin save of a post whose images
lack a width; the upload request never encodes
- journal:image-variants [--all] backfills
- featured_images[].variants {width, height, url, webp_url, source_width,
source_height} on the post answers (additive key)
