* wip
* Start testing
* Store host IDs, not hostnames
Why? Hostnames can change a lot, and therefore host filtering can be
funky. Really, all we want is a unique ID per machine + do not care what
it might be.
* Mostly just write a fuckload of tests
* Add a v0 kv store I can push to
* Appending works
* Add next() and iterate, test the pointer chain
* Fix sig
* Make clippy happy and thaw the ICE
* Fix tests'
* Fix tests
* typed builder and cleaner db trait
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Co-authored-by: Conrad Ludgate <conrad.ludgate@truelayer.com>