"Append JSON data to a stream associated with a dataset.
data.world streams are append-only by default. Alternatively, if a primary key is specified (see:
POST:/streams/{owner}/{id}/{streamId}/schema), data.world will replace records with the same primary
key value.
Streams don't need to be created before you can append data to them. They will be created on-demand,
when the first record is appended or by defining its schema.
Multiple records can be appended at once by using JSON-L (application/json-l) as the request content type.
IMPORTANT
Data uploaded to a dataset via a stream is not immediatelly processed. Instead, it is processed
automatically in accordance with the dataset settings (default: daily) or as a result of calling
POST:/datasets/{owner}/{id}/sync.
Once processed, the contents of a stream will appear as part of the respective dataset as a .jsonl
file (e.g. my-stream will produce a file named my-stream.jsonl)."