Implement Langchain Retriever for Orchestration / Grounding / Retrieval API

[pwasem]

Describe the Problem

When using the Grounding module one is not able to access the underlying Hana Vector store directly.
E.g. as seen here https://js.langchain.com/docs/integrations/vectorstores/hanavector/

Hence the grounding module cannot integrated into Langchain directly.

Propose a Solution

The idea would be to implement / provide a Langchain Retriever which wraps the Retrieval API.

Another idea would be to implement a Langchain Vector Store which also wraps the Vector API

Describe Alternatives

None

Affected Development Phase

Development

Impact

Impaired

Timeline

Implementation phase starts in April.

Additional Context

No response