Add status for fins to api, and allow force purge of fins

[MaartendeKruijf]

Is your feature request related to a problem? Please describe.
Allow the fins to be queried through the API, and allow them to be purged.

Describe the solution you'd like
Add a status api endpoint for Fins with different routs for query and purging

Describe alternatives you've considered
n.a.

Additional context
The way fins work is not transparent at this point so adding these controls will help in usability and visibility