[tor-bugs] #28282 [Core Tor/sbws]: Refactor bandwidth file generation code

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#28282: Refactor bandwidth file generation code
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     Reporter:  juga           |      Owner:  juga
         Type:  enhancement    |     Status:  assigned
     Priority:  Medium         |  Milestone:
    Component:  Core Tor/sbws  |    Version:
     Severity:  Normal         |   Keywords:  refactor, technical-debt
Actual Points:                 |  Parent ID:
       Points:                 |   Reviewer:
      Sponsor:                 |
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 Initially, `v3bwfile.py` was just converting measurement `Result`s to a
 `Bandwidth file` lines format.
 Then we started to apply scaling methods and filtering the measurements to
 satisfy certain restrictions.
 To don not have to modify code in other file/classes, all of that was
 implemented in `v3bwfile.py` classes/methos, but it should be moved to
 either an intermediate file/classes that deal with the statistics
 calculations (and not the format) or modify `Results` to be able to
 perform those calculations.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28282>
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