Added warning logs for triaging issues of default local redis instance being used although remote async redis instance is provided

[Shades-en]

What is happening?

When below conditions are met -

1. I Initialise EmbeddingCache with async_redis_client only.
2. I then use get method of EmbeddingCache - cache.get(text=text, model_name=model_name)

It defaults to using local redis client instead of the supplied async_redis_client without any warnings. Which in turn results to empty cache always.

It gets worse when we use SemanticCache and use EmbeddingCache with async_redis_client in its vectorizer

Since SemanticCache only accepts synchronous redis_client we may tend to use check method or store method instead of astore or acheck method, which in turn again calls cache.get(text=text, model_name=model_name) and it return EMPTY CACHE

Hence warning logs become neccessary.

What is done?

I have added some warning logs in case if developer supplies async_redis_client but uses get/ mget/set/mset methods.