[Feature Request]: Support interleaved embeddings of None

[HammadB]

Describe the problem

We don't currently support adding data where some of the embeddings are values and some are None. This could be valid, say I have brought in embeddings for some of my records from somewhere else.

Describe the proposed solution

Allow add with some populated and some unpopulated fields

Alternatives considered

No response

Importance

nice to have

Additional Information

Doesn't seem super important