Not paginated. A property carries a small, bounded number of media items, so the whole set
comes back in one call.

Items are grouped by mediaType and ordered by order within it. order runs per media
type, so an image and a floor plan can share a position — pass media_type when you need a
single, uninterrupted sequence.

url is an absolute, publicly fetchable address. Documents are a separate resource and are
not returned here.