Async compatibility shim that delegates to the sync batch() method.
This store is built on the synchronous azure.cosmos.CosmosClient
and cannot perform native async I/O. The call is run in a thread-pool
executor so it does not block the event loop.
For true async Cosmos DB operations, use
:class:~langchain_azure_cosmosdb.aio.AsyncCosmosDBStore instead,
which is built on azure.cosmos.aio.CosmosClient.