AO3-6015 Script to get data for guests

[brianjaustin]

Pull Request Checklist

• Have you read "How to write the perfect pull request"?
• Have you read the contributing guidelines?
• 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)
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  until they are reviewed and merged before creating new pull requests.

Issue

https://otwarchive.atlassian.net/browse/AO3-6015

Purpose

Adds a script to get data for guests/deleted users by email (i.e. for GDPR reasons)

Credit

sarken, for the majority of the script
Brian Austin, for some YAML stuff to handle audit entries properly

[redsummernight]

You can replace this list with Rails.application.config.active_record.yaml_column_permitted_classes.

otwarchive/config/application.rb

Lines 82 to 87 in e785293

	config.active_record.yaml_column_permitted_classes = [
	ActiveSupport::TimeWithZone,
	Time,
	ActiveSupport::TimeZone,
	BCrypt::Password
	]

[redsummernight]

If the comments are indented like this, can you move them into the next block, e.g. # Changed email address under when "email"?