Implement cache invalidation

[bramstroker]

Whenever a new profile is submitted to the library or a profile update we need to make sure all caches are correctly invalidated.

Both library endpoint and download/{manufacturer}/{model} endpoint.

• [x] Cloudflare cache
• [x] API memory cache of the express server

Cloudflare

https://developers.cloudflare.com/api/operations/zone-purge#purge-cached-content-by-url

[bramstroker]

Done