Look-up AR::Encryption attributes in gitlab:doctor:secrets task

What does this MR do and why?

This will allow to detect misconfigured AR::Encryption secrets.

References

• Solves Look-up AR::Encryption attributes in gitlab:doc... (#535128 - closed) • Rémy Coutable • 17.11.

Screenshots or screen recordings

Output of the gitlab:doctor:secrets task (the first three models are using Active Record Encryption):

How to set up and validate locally

Run bundle exec gitlab:doctor:secrets.

MR acceptance checklist

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