Add OpenPGP key to LDAP directory and User model

db/migrate/20240922205634_add_pgp_fpr_to_users.rb

@@ -0,0 +1,5 @@
+class AddPgpFprToUsers < ActiveRecord::Migration[7.1]
+  def change
+    add_column :users, :pgp_fpr, :string
+  end
+end