Distributed Cache at the API Layer level

[puthurr]

Implement a distributed caching to improve general performance.

A good candidate of caching are document cover images for instance. Cache entries like cover page which is the first image extracted from a PDF or PowerPoint, could be added at indexing time.

Reference documentation
[Distributed Caching] (https://docs.microsoft.com/en-us/aspnet/core/performance/caching/distributed?view=aspnetcore-6.0)