feat: Record source performance counters in uproot.dask report

[nsmith-]

Report type is now

type: 7 * {
    call_time: ?unknown,
    duration: float64,
    performance_counters: {
        num_requested_bytes: int64,
        num_requests: int64,
        num_requested_chunks: int64
    },
    args: var * string,
    kwargs: var * unknown,
    exception: ?unknown,
    message: ?unknown,
    fqdn: ?unknown,
    hostname: ?unknown
}

[jpivarski]

I scanned over all of the changes. It looks like it does what you need, and I don't see any way that this could negatively impact any other parts of Uproot. So I'd say it's ready to merge!

In your example type, there were a lot of ?unknown fields. They must have been always None in the example that you ingested with ak.from_iter and checked the type of.

[nsmith-]

Yes, those are fields that are only set for failed files. I could force a failure to show the full type; it is a union of types as defined by _report_success and _report_failure.