Jim/vectordb update

[jimmoffet]

Changelog Entry

Description

• Switch vector store from chrome in memory to a remote redis server using Redis VL to handle vector operations. Other minor changes to UI.

Added

• vector_client.py provides a client class and a collection class that wraps both chroma and redis and provides a single interface for both and VECTOR_STORE flag to plug them in and out. Very minor tests for this that need better mocks.
• also added asynchronous embedding calls to Azure embedding endpoint, vector-indexing uploaded docs is much faster now

Changed

• Lots of minor changes to look and feel.

Deprecated

• Chroma hasn't really been tested after implementing the new interface, it should be removed and postgres with PGVector added as an alternative to redis (better for larger stores)