Completa modulo Replay: S3, retention, sync YouTube e gestione società.

Streaming chunked da Garage, purge con delete YouTube, privacy sincronizzata,
archivio club migliorato, retention 30/90 separata da stato abbonamento.

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

backend/app/models/recording.rb

@@ -141,6 +141,28 @@ class Recording < ApplicationRecord
     count == 1 ? "1 visualizzazione" : "#{count} visualizzazioni"
   end
 
+  def source_platform
+    metadata.is_a?(Hash) ? metadata["source_platform"].presence : nil
+  end
+
+  def source_platform_label
+    case source_platform
+    when "youtube" then "YouTube"
+    when "matchlivetv" then "Match Live TV"
+    else "—"
+    end
+  end
+
+  def playable_on_site?
+    ready? && storage_key.present?
+  end
+
+  def days_until_expiry
+    return nil unless expires_at
+
+    ((expires_at - Time.current) / 1.day).ceil
+  end
+
   def status_label
     return "Eliminato" if deleted?
     return "Scaduto" if status == "expired"