Fix #3696: API: handle boolean params consistently

* Use ApplicationRecord#attribute_matches to handle boolean attributes
  consistently in search methods.

* Add support for searching various boolean attributes that previously
  weren't supported.

app/models/note_version.rb

@@ -17,6 +17,8 @@ class NoteVersion < ApplicationRecord
       q = q.where(note_id: params[:note_id].split(",").map(&:to_i))
     end
 
+    q = q.attribute_matches(:is_active, params[:is_active])
+
     q.apply_default_order(params)
   end