Caching in shiny and django

[cmatKhan]

@MackLiao -- we'll put "discussion" items here rather than in issues. Eg for the "Consider caching" issue:

There are a few layers of caching already built in -- one is at the database level, if the data hasn't changed since the last time it was requested, it will serve a stored copy rather than making a database request.

Another is at the tfbpapi level -- a given AbstractAPI instance will store cached results

https://github.com/BrentLab/tfbpapi/blob/main/tfbpapi/AbstractAPI.py

And finally, it is possible that shiny itself has some caching tools -- not sure.

Performance isn't the priority right now, but thinking about smart caching isn't a bad idea. As possible spots to monitor or implement caching come up, feel free to note them in the comments here