Better file naming in cache

[chauhankaranraj]

Is your feature request related to a problem? Please describe.
Currently the caching function saves the results of a prometheus query as a parquet file whose name is a hash key (e.g. ab0foofbeef0cd). As a first time user of the anomaly detection work, I want to be able to quickly look at the data being used, without having to dive into the notebooks. I also want to be able to easily work with the provided data outside of the notebooks already in the repo. This is a bit tedious right now since I have to manually inspect the demo notebook to know which file corresponds to which prometheus metric.

Describe the solution you'd like
Update the caching function to include the prometheus metric name and possibly some labels in the file name that the result is being saved as.