[WIP] Add functionality to gather author stats in Etherpad

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>Get Actual Author stats from a real life instance</issue_title>
<issue_description>> "A hyperactive author tries to replicate a really active author pushing 4 characters a second. This is rare in Etherpad *needs citation."

Have been given permission to gather stats of this. Needs a commit to Etherpad core probably or maybe I can write this as a plugin?
</issue_description>

Comments on the Issue (you are @copilot in this section)

@JohnMcLear Thinking about what stat is useful.

of edits per second per user.

I would need total connected time and total "ACCEPT_COMMIT"

This would give me an average commits per user per second

At the moment we have "lurkers" and "authors", this might be realistic, but why not just have "users". If we have a set value of "user" makes X commits per Y seconds (let's say 5) then an instance could check their averageCommitPerUserPerSecond value in "/stats" and drop that into the load testing site.

A heavy instance might actually have a lot of lurkers and just a few authors, so the averageCommitPerUserSecond would actually be low. This instance would need something else...

author commits per second

Time connected to pad(in seconds) / number of commits
Example. 60seconds / 60commits = 1

I still need to think some more about this.

lurkers

An option might be to have a lurker value visible in stats where a user that connects never actually sends any contributions. I guess you could just collect totalConnectedUsers and have a totalLurkers type value that is on a counter and is incremented when a user joins and then if that user sends a changeset (becomes an author) then the counter is decremented.

todo

• Lurker %
• Average Commits per second</comment_new>
  <comment_new>@JohnMcLear
  WMF ftw.

https://hal.inria.fr/hal-01882069/document