feat: followup #1945 after testing nft-ttr cron

[gobengo]

Motivation:

• after merging feat: create cron nft-ttr to measure nft time to retrievability #1945 into main so gh actions cron would run it, I took a look https://github.com/nftstorage/nft.storage/actions/runs/2518516959 and found some things to fix
• the stdout of the gh action job didn't include all logs of what happened. This PR logs them all so we have visibility into what is going on
• when devving I also noticed that whereas the gh action was trying to pass 2 different ipfs gateways to test retrieving through, only the first was getting used. This PR fixes the sade parsing and cli invocation to pass two gateways through two --gateway {gatewayUrl} flags (space-delimited values used to work with yargs, but not so easy with sade, so for now lets just do one-value-per-flag)
• remove byteLength label from the prometheus histogram. I'm not sure that it really adds value as it was (e.g. without bucketing). For now I just want to get something useful showing in grafana without as little extra fields as possible, so dont need byteLength.
  • once we have some working dashboard/queries that dont consider byteLength, it probably is a good idea to make that data available to grafana queries. again, I'm just kinda new to prometheus outside of tinkering, and could use some direction/pairing from someone that has dealt with the histograms before
• fix issue where multiple gateways would be fetched/measured serially. This would mean that gateways other than the first wouldn't measure what we want - their clock wouldn't start until earlier gateways had fully completed. Now the gateways are fetched/retrieved in parallel

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Codecov Report

Merging #2000 (a4bbe05) into main (377b045) will not change coverage.
The diff coverage is n/a.

❗ Current head a4bbe05 differs from pull request most recent head 87972c9. Consider uploading reports for the commit 87972c9 to get more accurate results

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  Coverage   100.00%   100.00%           
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  Files            5         5           
  Lines         1259      1259           
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  Hits          1259      1259           

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[gobengo]

these buckets should help give some granular measurement to the panels i set up here: #2003