If `Nokogiri::HTML(value).at_xpath('//body')` fails to find the `body` element, it will return `nil`. We can guard against that with an early return. Avoids calling `children` on `Nilclass` in those cases.
- 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
