Cache answers

[ModischFabrications]

People that are trying this service out are likely to queue the same result multiple times.
Caching these values will really save some execution time.

This is somehow relevant to #24

[ModischFabrications]

Measure RAM size and performance for a comparison. Caching will result in some faster responses, but slows down every request and will increase ram usage.

[ModischFabrications]

It would also be nice to get a "/cached" path to debug successful caching and offer "offline" solutions

Remember to add a "cached" field to response object

[ModischFabrications]

Problem: Uvicorn will spawn different processes in parallel, which will have difficulties keeping a shared cache. Redis and other external solutions might be nice, but have huge overhead. Might be able to cache requests in middleware before passing them to backend