[tor-bugs] #16225 [Metrics/metrics-lib]: Unify exception/error handling in metrics-lib

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#16225: Unify exception/error handling in metrics-lib
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 Reporter:  karsten              |          Owner:  karsten
     Type:  enhancement          |         Status:  needs_information
 Priority:  Medium               |      Milestone:  metrics-lib 1.7.0
Component:  Metrics/metrics-lib  |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:                       |  Actual Points:
Parent ID:                       |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by karsten):

 Here's a related question from #16151 (discussion around
 `DescriptorCollector`) that was the sole reason for keeping that ticket
 open: "When receiving something other than a 200 response code while
 fetching the directories or files shouldn't that be reported in some way?
 Things like redirects, bad requests, not authorized, or others might be
 important for the caller?"

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16225#comment:7>
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