[tor-bugs] #31407 [Core Tor/Tor]: Create a broker spec for metrics collection

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#31407: Create a broker spec for metrics collection
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     Reporter:  cohosh        |      Owner:  (none)
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  tor-spec
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 We're in the process of creating a module for the collection of snowflake
 metrics (#21315, #29461). We need a better place to put the spec for the
 metrics data output by the snowflake broker than a comment in the source
 code (see https://trac.torproject.org/projects/tor/ticket/29461#comment:5)

 A spec for the broker will also be useful to expand upon later to specify
 how the broker interacts with other pieces of either Snowflake or the Tor
 ecosystem in the case that the broker assumes more of the responsibilities
 of BridgeDB.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31407>
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