Make Manifests FDOs

[ihlec]

https://fdo.portal.mardi4nfdi.de/fdo/Q5565613

[physikerwelt]

Current format

{
  "ingester_id": "12D3KooWRzRr7iuh5ALqwXgfdZHGeKQLZK8t8erpscTBv1f4rFqG",
  "meta_ref": "file://beel09c.pdf",
  "payload": "QmSxuUgmRRZkVG3CMRFqUWkYY1ePHBzVKDTgMRkK8fWaEN",
  "sig": "mtlDyNCSyY1GbYU0XOMHwMdF8XXAuqFaNDc+ly3Zl21aGE7gXZSiQ93UFcb8qyk3h1Nh2D3Xk7XA6xO03uWnAQ==",
  "size": 891496
}

the future format should include all information required to filter which files to re-provide based on the information that is in the manifest file.

FDOs linked above do currently not include ipfs links

Datasets have a download url
https://github.com/MaRDI4NFDI/mardi_fdo_server/blob/34794929289c17c641a9cf0f6fec604d1333f1e1/fdo_schemas/dataset.py#L72-L76

but this is missing for publications

https://github.com/MaRDI4NFDI/mardi_fdo_server/blob/master/fdo_schemas/publication.py