Use Database to store reports

[elmoritz]

Right now the project is storing every days report in a compressed json file, which is neither good for analytics nor for space on disk.

I was looking for a solution to use a performant database that could handle json as values and would not need a separate container or service to host.
A single file Database would be optimal.

DuckDB might be the right thing, but I have some issues with the syntax used to access the entries.