[metrics-bugs] #16513 [Metrics/Onionoo]: Make writing of the out/ directory from the status/ directory deterministic

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#16513: Make writing of the out/ directory from the status/ directory deterministic
-----------------------------+--------------------------------
 Reporter:  karsten          |          Owner:  metrics-team
     Type:  enhancement      |         Status:  needs_revision
 Priority:  Medium           |      Milestone:  Onionoo-2.0.0
Component:  Metrics/Onionoo  |        Version:
 Severity:  Blocker          |     Resolution:
 Keywords:  metrics-2018     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:  iwakeh           |        Sponsor:
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Changes (by karsten):

 * status:  needs_review => needs_revision


Comment:

 I'm going to revise my branch based on an idea I had yesterday related to
 #24831: let's use the time when we last saw a relay in a consensus (and a
 bridge in a status) to determine which graphs to produce. This has
 advantages over other approaches:
  - It does not depend on system time, which is what we're trying to
 resolve here.
  - It does not rely on statistics reported by the relay or bridge, which
 breaks if a relay or bridge has a broken clock, and which may lead to
 different documents (bandwidth, weights, etc.) showing somewhat different
 time periods.
 Branch follows, but I'll have to implement and test the idea first.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16513#comment:15>
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