this obviously speeds up startup, it's hopefully also less likely to
break surprisingly, and i hope it's the path to me shipping forks of
official extensions.
this is working -- forked to support sops as a backend --
without totp support yet. it's possible in theory: i might just need to
write some adapter logic.
upstream discussion about genericizing backend support:
- <https://github.com/browserpass/browserpass-native/issues/127>
