AO3-7445 Forbid guest comments from using misleading names

[danderson]

Pull Request Checklist

• Have you read the contributing guidelines?
• Have you read "How to write the perfect pull request"?
• Have you added tests for any changed functionality?
• Have you added the Jira issue number
  as the first thing in your pull request title (e.g. AO3-1234 Fix thing)
• Do you have fewer than 5 pull requests already open? If not, please wait
  until they are reviewed and merged before creating new pull requests.
• I acknowledge that submitting code created or modified with the help of AI is a bannable offense.

Issue

https://otwarchive.atlassian.net/browse/AO3-7445

Purpose

Prevents guest comments from using potentially misleading names, specifically: login names of official accounts, protected accounts, and of the orphan account if work orphaning is enabled in site config.

References

This issue is also listed at https://github.com/otwcode/otwarchive/wiki/Issues-seeking-coders, which is how I found it.

Credit

David Anderson (he/him)

[ASalbenblatt]

Looks good to me! I also marked the Jira issue as in review so no one else picks it up :)

That wiki page is only editable by volunteers so I will let someone else update it.