* Test blank account field verifiability
This change tests the need for #20428, which ensures that we guard against a situation in which `at_xpath` returns `nil`.
* Test verifiability of blank fields for remote account profiles
This adds a counterpart test for remote account profiles' fields' verifiability when those fields are blank. I previously added the same test for local accounts.
- Change verification to happen in `default` queue
- Change verification worker to only be queued if there's something to do
- Add `link` tags from metadata fields to page header of profiles
