[metrics-bugs] #22681 [Metrics/Onionoo]: adapt onionoo to use metrics-lib 1.9.0

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#22681: adapt onionoo to use metrics-lib 1.9.0
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 Reporter:  iwakeh           |          Owner:  metrics-team
     Type:  enhancement      |         Status:  needs_review
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:                   |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Comment (by iwakeh):

 Replying to [comment:2 karsten]:
 > Ah, hang on, I already have temp commits for using metrics-lib 1.9.0 in
 several applications here.  I didn't know you were working on this.  Let
 me push and share my temp branches here in a minute!

 The above branch is simply making the tests compile, not using any new
 ml-190 features.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22681#comment:4>
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