Introduce architettura multi-sport con catalogo, engine scoring e overlay.

Catalogo sport in YAML, board implicito, engine per volley/basket/timed/racket/timer/generic, regia e app Android allineate.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/config/application.rb

@@ -22,6 +22,8 @@ module App
   class Application < Rails::Application
     config.load_defaults 7.2
     config.autoload_lib(ignore: %w[assets tasks])
+    config.autoload_paths << Rails.root.join("app/domain")
+    config.eager_load_paths << Rails.root.join("app/domain")
     config.api_only = false
     config.active_job.queue_adapter = :sidekiq
     config.time_zone = "Europe/Rome"