[metrics-bugs] #29344 [Metrics/Analysis]: Consider heartbeat frequency, logging and extra-info statistics

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#29344: Consider heartbeat frequency, logging and extra-info statistics
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     Reporter:  irl               |      Owner:  metrics-team
         Type:  task              |     Status:  new
     Priority:  Very High         |  Milestone:
    Component:  Metrics/Analysis  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
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 The heartbeat logging, which includes statistics that we consider
 sensitive when including them in the extra-info descriptors, captures
 these statistics at smaller intervals than we do for extra-info
 descriptors. This is currently enabled by default in both the source
 distribution and the official Debian packages.

 As these are legally discoverable (by virtue of the fact that they exist)
 we should consider what attacks are enabled and what risk we place on
 guard/middle relay operators and our users by collecting them.

 The statistics have clear engineering value, but it is not clear how much
 that value degrades when looking at larger intervals.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29344>
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