Create distinction between public and protected jobs

[jjnesbitt]

This would probably live in the GitlabJobDataDimension table.

[jjnesbitt]

Notary jobs and protected service jobs should have the protected tag added to them.

• The notary job should always have it, as it's always protected.
• For service jobs, they can be both protected and non-protected, so we should delineate protected service jobs with the protected tag.