to parse and store only the needed fileds to calculate the relay
balance ratio and make it faster.

and use instead the ones from the models.
Also stop filtering ratios as they should be already filtered.

and add the possibility to don't parse relay bandwidth lines for a
given bwauth.

to be able to create graphs separating relay types (guard, middle,
exit, guard + exit)

to store the ratios and save time calculating them again.
Also:
- obtain bwauth from votes, if there are
- add parameter to manager's `from_bandwidth_file` method to skip
  parsing a bwauth's bwfile Relay Lines
- add some comments

and forgotten template

Part of tpo/network-health/metrics/analysis#33077

and update the current bwauth list

Part of tpo/network-health/metrics/analysis#33077.

and linter settings

and remove unneded methods and attributes.

Partly closes tpo/network-health/sbws#40051

since it is a guess and not always known.
And stop deleting bwfiles when deleting bwauth.

after importing a concrete file.

also:
- Add back Bwauth
- change function to select bwauth
- change import functions

Also:
- add Managers
- parse bandwidth file from file
- update is router status updated
- add is_exit

and related ones.
Also:
- import from specific file
- handle importing consensus from the file
- add Managers to import the data, instead of doing so from the
  file2models functions