Paginated media library items across workspaces you can access
data, links, meta — same shape as List posts). Items include workspace_id, folder_id, id, url, etc.
root_only.folder_id null). Do not use with folder_id.200 — paginated APIMedia objects in data.
401 · 403 · 422 (invalid filters, e.g. wrong workspace or folder_id + root_only together)
See Media overview.