Add ltl mode support

db/migrate/20230911022527_add_ltl_to_antennas.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require Rails.root.join('lib', 'mastodon', 'migration_helpers')
+
+class AddLtlToAntennas < ActiveRecord::Migration[7.0]
+  include Mastodon::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  def change
+    safety_assured do
+      add_column_with_default :antennas, :ltl, :boolean, default: false, allow_null: false
+    end
+  end
+end