No ID references in data dumps

[nuest]

The data dumps in different formats currently reference sources and collections by their identifier, but those identifiers are meaningless to a data downloader.

To provider a fuller picture, the collections and sources possibly need matching data dumps? Alternatively, the fields could contain a unique identifier, such as the OpenAlex ID for the source and just the name of the collection.

Check all fields for meaningfulness/understandability.

Also, is the "job" column useful?

[nuest]

The solution to this should take advantage of the new endpoints for collections and sources, so that there can be added the name of the source and the stable API endpoint of the source where more information about the source can be retrieved.