`val assert_results_dir : string ‑> unit`

Check that the results dir exists and sets up logging, the database, etc.

`val remove_results_dir : unit ‑> unit`

Recursively delete the results directory.

`val create_results_dir : unit ‑> unit`

Create the results dir and sets up logging, the database, etc.

`val delete_capture_and_analysis_data : unit ‑> unit`

delete all results from the capture and the analysis