[metrics-bugs] #33421 [Metrics/Onionperf]: Track which Guard is used for experimental measurements

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#33421: Track which Guard is used for experimental measurements
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 Reporter:  acute                      |          Owner:  metrics-team
     Type:  enhancement                |         Status:  needs_information
 Priority:  Medium                     |      Milestone:
Component:  Metrics/Onionperf          |        Version:
 Severity:  Normal                     |     Resolution:
 Keywords:  metrics-team-roadmap-2020  |  Actual Points:
Parent ID:  #33321                     |         Points:  3
 Reviewer:                             |        Sponsor:  Sponsor59-must
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Comment (by mikeperry):

 Yes. Tracking the GUARD event and marking CIRC events with match/mismatch
 will indeed solve the issue, and will help us diagnose other weird guard
 usage problems as well.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33421#comment:10>
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