Unstructured

Fixes

* **Use validate_default to instantiate default pydantic secrets**

Enhancements

* **Better destination precheck for blob storage** Write an empty file to the destination location when running fsspec-based precheck

Fixes

* **Drop use of unstructued in embed** Remove remnant import from unstructured dependency in embed implementations.

Fixes

* **Add constraint on pydantic** Make sure the version of pydantic being used with this repo pulls in the earliest version that introduces generic Secret, since this is used heavily.

Fixes

* **Model serialization with nested models** Logic updated to properly handle serializing pydantic models that have nested configs with secret values.
* **Sharepoint permission config requirement** The sharepoint connector was expecting the permission config, even though it should have been optional.
* **Sharepoint CLI permission params made optional

Enhancements

* **Migrate airtable connector to v2**
* **Support iteratively deleting cached content** Add a flag to delete cached content once it's no longer needed for systems that are limited in memory.

Enhancements

* **Support async batch uploads for pinecone connector**
* **Migrate embedders** Move embedder implementations from the open source unstructured repo into this one.

Fixes

* **Misc. Onedrive connector fixes**