Retry/batching strategy to protect against timeouts

[hemidactylus]

A retry strategy (essentially, it could be three parameters num_retries, retry_timeout, retry_sleep_seconds) for CQL operations.

This might have interplay with a batching strategy at cassIO level. However, given the current design of cassIO/langchain integration (e.g. vector store insert many) one should move the whole insert-many into cassIO (which could even make sense after all).
So cassIO would espose a put_many method that internally handles even batching.