dynamic requests: handle deleted/processing/queued statuses (#3824)

Fix bug where [ta:1234] didn't render if the request's status was
'deleted', 'queued', or 'processing'.

app/models/tag_relationship.rb

@@ -43,10 +43,18 @@ class TagRelationship < ApplicationRecord
     self.consequent_name = consequent_name.mb_chars.downcase.tr(" ", "_")
   end
 
+  def is_approved?
+    status.in?(%w[active processing queued])
+  end
+
   def is_retired?
     status == "retired"
   end
 
+  def is_deleted?
+    status == "deleted"
+  end
+
   def is_pending?
     status == "pending"
   end