Metric: Distribution of observed accepted requests by provider

[kylehuntsman]

I think the plot we end up wanting is that at a given time, how many providers are we doing 1 retrieval from? how many are we doing 2 from?, etc. We’re worried that there are defaults at a couple places, and we may see that even as we do a lot of transfers, we may have a bunch of providers who rate limit us to not allow more than e.g. 20 simultaneous transfers.

• Underlying data can be short lived for now
• Grafana metrics don't need the provider ID, just the distribution of number of requests per provider