Fix being able to spoof link verification (#20217)

- 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

app/views/accounts/show.html.haml

@@ -8,6 +8,9 @@
   %link{ rel: 'alternate', type: 'application/rss+xml', href: @rss_url }/
   %link{ rel: 'alternate', type: 'application/activity+json', href: ActivityPub::TagManager.instance.uri_for(@account) }/
 
+  - @account.fields.select(&:verifiable?).each do |field|
+    %link{ rel: 'me', type: 'text/html', href: field.value }/
+
   = opengraph 'og:type', 'profile'
   = render 'og', account: @account, url: short_account_url(@account, only_path: false)