Aggiunge cookie policy, banner consenso e Google Analytics opzionale.

Il banner consente solo necessari o tutti i cookie; GA4 si carica solo dopo
consenso. Aggiornati privacy, footer, sitemap e variabile GOOGLE_ANALYTICS_MEASUREMENT_ID.

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

backend/config/initializers/match_live_tv.rb

@@ -140,5 +140,13 @@ module MatchLiveTv
     def replay_download_url_ttl_seconds
       ENV.fetch("REPLAY_DOWNLOAD_URL_TTL_SECONDS", "900").to_i
     end
+
+    def google_analytics_measurement_id
+      ENV["GOOGLE_ANALYTICS_MEASUREMENT_ID"].presence
+    end
+
+    def google_analytics_configured?
+      google_analytics_measurement_id.present?
+    end
   end
 end