also, make it work.

This format for the file can be generated automatically using something like:

  nix-prefetch-github \
    --nix \
    --rev $(git rev-parse HEAD) \
    PrivateStorageio ZKAPAuthorizer > /path/to/zkapauthorizer-repo.nix

run in in a checkout of ZKAPAuthorizer

Let us pick Ristretto and supply a key if we like.

also if get-passes fails dump the tahoe logs

it needs the plugin too

only useful for debugging failed test runs

at least, maybe.  we don't actually get any zkaps from this as of now.

Put it into a language that I can more easily maintain

The issuer runs.  Helpers to poke the right API calls into the right place
forthcoming...

Add an end-to-end system test for Tahoe-LAFS storage interaction.

just need 35 more hosts and then defining the function will be a win ...

Also improve failure reporting.

Support configuration for the issuer location.

Depend on ZKAPAuthorizer's overlays for anything ZKAPAuthorizer requires.

It knows better than we do about its own dependencies.  Let it control them.