Get brand images

The brand’s image library — dual-mode. Pass ?q= for SEMANTIC search (the query is embedded + vector-searched over the brand’s indexed assets; ?type and ?aspectRatio narrow it) — this path is credit-metered (402 INSUFFICIENT_CREDITS when out of credits). Omit ?q= to BROWSE the stored harvested + generated library (free), optionally filtered by ?type / ?aspectRatio. Either way returns { data, pagination } of images with a description + dimensions. (The smaller identity / emailDesign / imageStyle / logos sub-resources embed into GET /v1/brand?include=…; images stay separate because they paginate.)