In opensearch-py >= 3.0.0, IndicesClient.refresh() no longer accepts the
index name as a positional argument. This causes a TypeError when
uploading documents to knowledge bases with OpenSearch backend.
Changes positional arguments to keyword arguments (index=...) in all
three refresh() calls in the OpenSearch vector DB client.
Fixes#20649
- Created `VectorDBBase` as an abstract base class to standardize vector database operations.
- Added required methods for common vector database operations: `has_collection`, `delete_collection`, `insert`, `upsert`, `search`, `query`, `get`, `delete`, `reset`.
- The base class can now be extended by any vector database implementation (e.g., Qdrant, Pinecone) to ensure a consistent API across different database systems.
- This PR aims to address the error 400: "**'OpenSearchClient' object has no attribute 'query'**".
- With the implemented query() method, this issue should be resolved and allow uploaded documents to be vectorized and retrieved based on the given query.
