Got it to compile!
This could be chinese for all I know.

The author of the library used says the tests currently fail.
This might be a problem with how Nix handles things.

Also, client-side quantile computation is not available
anymore.  We'll just user server-computed histograms instead.

Add a metric for signatures issued

Record first successful redemption of any voucher, counter pair

So, let it.  Just demonstrate we at least see the test metric.

Add general HTTP metrics and particular Stripe charge metrics

It was passing but only after ~57 seconds because the busy_timeout setting in
the test definition was being applied to a different connection than was being
used by the implementation.

With this change we hook into the connection function and apply the shorter
busy_timeout after the normal setup work is done but before handing the
connection off to application code.

Have fewer SQLite3 "busy" errors

Handle exceptions during SQLite3 schema initialization and close the connection if necessary

Speed up the blinded token fingerprinting function

It seems to be faster to hash one huge string than many smaller ones that
total to the same length.  Also by only showing one final hash we remove O(N)
show calls.

The old and new fingerprints are not compatible but I haven't deployed this
in production anywhere yet so that doesn't bother me.  Had I, we'd need some
kind of versioning scheme for fingerprint computation I suppose.

Delay redemption response if it would be a "not paid" error

Internally try repeatedly to try to be able to return a success response.

I should really learn how to do some real logging...

Fix intermittent "Database is locked" errors