Store remote images/videos into the workspace library from JSON — direct URLs, social links, Unsplash, etc.
application/json with a list of URLs. The API downloads or resolves each URL (same pipeline as the in-app URL importer: direct image/video links, supported social post URLs, Unsplash, etc.) and creates media library rows in the given workspace.
Response is 200 with media (array of created items) and count_stored. Some inputs produce more than one media object. URLs that fail validation or fetch may be skipped — media can be empty while still returning 200.
For binary uploads from disk, use Upload from file instead.
workspace_idid for use in POST /posts … content[].mediamedia