Publish, approve, fetch

Goal

Create a published asset on a space, upload bytes, list items awaiting approval, and download by opaque id.

Steps

1. Authenticate and obtain a spaceId
2. POST /v0/spaces/{spaceId}/assets — metadata only; capture newPublishedAssetId
   Subject to spaces.publishedAssets.perDay
3. POST /v0/media/spaces/{spaceId}/assets/{assetId} — multipart field file
4. Owner review: GET /v0/spaces/{spaceId}/assets/awaiting-approval (part descriptors only; no storage paths)
5. PATCH /v0/spaces/{spaceId}/assets — update asset state as exposed in OpenAPI
6. GET /v0/media/spaces/{spaceId}/assets/{assetId}?part=base — stream bytes

Details: Media uploads. Limits: Errors & limits.