Harden count error handling

[johncmerfeld]

Runway has encountered issues fetching records from ODSs. It's hard to debug those issues because the count method, which runs before fetch, does not handle errors the same way that other methods do.

The two changes here:

1. handle 401s – we have seen those in the wild so I believe diagnosability would improve if we could at least attempt a token refresh, and I see no cost to doing so
2. Include the error text in the console output / results file. Again I see no cost to doing this, and adding more verbose errors elsewhere has reaped benefits.