Fix app name, website and redirect URIs not having a maximum length (#16042)

Fix app scopes not being validated

app/lib/application_extension.rb

@@ -4,6 +4,8 @@ module ApplicationExtension
   extend ActiveSupport::Concern
 
   included do
-    validates :website, url: true, if: :website?
+    validates :name, length: { maximum: 60 }
+    validates :website, url: true, length: { maximum: 2_000 }, if: :website?
+    validates :redirect_uri, length: { maximum: 2_000 }
   end
 end