API/SDK: add bulk dataset item insert to improve versioning

[VildMedPap]

Describe the feature or potential improvement

You support version history for dataset items, but since we can only insert items one by one via the API / SDK, your platform creates a new version for every single insert. Version history would be much more useful if versions were tied to bulk or batch inserts instead of individual ones.

To achieve that, you would need to add bulk or batch dataset item insert support to the API / SDK. As an alternative, you could group single inserts into one version on your side if they happen within a short time window, but that feels brittle. So my suggestion is to simply support bulk or batch inserts in the API / SDK, similar to what you already allow via the Langfuse UI.

Additional information

No response

[marliessophie]

Agree! This is helpful to add. For the record, CSV upload or duplicating a dataset already works in this way. Will share here when we build a POST API for multiple dataset items.