Append rows
Append rows to the stream. Every row is validated against the locked format; one bad row rejects the whole batch (nothing is written). A correction is a new row with supersedes naming the row it replaces — it takes effect in snapshots cut from now on, older snapshots keep the original. Emits one dataset.rows_appended webhook per batch.
Authorizations
API key with the vk_ prefix. Create one from the dashboard.
Path Parameters
Dataset ID or name
Body
Response
The appended row range
row_id of the first entry in this batch.
row_id of the last entry in this batch (== the new stream head).
The locked row format of a stream. Detected from the first row and enforced on every later append (a mismatched row 400s the whole batch).
prompt, preference, completion, chat 
