[RedisIO] - it's not possible to retrieve with PFCOUNT command the count of all the unique queries

Currently, it's not possible to use PFCOUNT command to retrieve the unique queries

it seems that what we need to do is to create a public function on Read that would do it something like:

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public Response<Long> readUsingPFCOUNTCommand(String key) {

 return pipeline.pfcount(key, value);

 }

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