This pull request includes several changes to the python/src/reag/client.py file to improve the parallel processing of document batches and minor adjustments in the python/tests/test_client.py file. The most important changes include adding asynchronous processing for document batches and reorganizing the return statement for clarity.

Improvements to parallel processing:

• python/src/reag/client.py: Added tasks for parallel processing within the batch and used asyncio.gather to process all documents in the batch concurrently. This change improves the efficiency of handling document batches.

Code organization and readability:

• python/src/reag/client.py: Moved the return statement outside the batch loop to ensure all results are returned after processing all batches. This change clarifies the flow of the function.

Minor code adjustments:

• python/tests/test_client.py: Fixed the import statement to correctly import ReagClient, Document, and QueryResult from reag.client instead of src.reag.client.