DWI-29 Fast API Docs

[niquerio]

So far this has some breadcrumbs for filling out documentation in FastAPI.

There's some application metadata changes in aim/digifeeds/database/main.py. Documentation

There's an example item described in aim/digifeeds/database/schemas.py. Documentation

In main.py and in schemas.py there's example of how to document non-200 responses. Documentation

In main.py there's an example of using a docstring to describe an api path. Documentation