Log files are stored in the application folder.
The latest log file is named ludusavi_rCURRENT.log,
and any other log files will be named with a timestamp (e.g., ludusavi_r2000-01-02_03-04-05.log).
By default, only warnings and errors are logged,
but you can customize this by setting the RUST_LOG environment variable
(e.g., RUST_LOG=ludusavi=debug).
The most recent 5 log files are kept, rotating on app launch or when a log reaches 10 MiB.