[metrics-bugs] #34109 [Metrics/Statistics]: Download and parse OnionPerf analysis .json files instead of .tpf files

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#34109: Download and parse OnionPerf analysis .json files instead of .tpf files
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     Reporter:  karsten             |      Owner:  karsten
         Type:  defect              |     Status:  assigned
     Priority:  Medium              |  Milestone:
    Component:  Metrics/Statistics  |    Version:
     Severity:  Normal              |   Keywords:
Actual Points:                      |  Parent ID:
       Points:                      |   Reviewer:
      Sponsor:                      |
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 With #34070 and #34072 being merged and deployed we can now change
 metrics-web to download and parse OnionPerf analysis .json files instead
 of .tpf files.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34109>
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