Fix YouTube in attesa: disabilita auto_stop e ricrea broadcast chiusa

YouTube chiudeva la diretta (complete) senza ingest stabile; ora
enable_auto_stop è false e SetupBroadcast.recreate! rigenera link/stream key.

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

backend/app/services/youtube/broadcast_service.rb

@@ -24,7 +24,7 @@ module Youtube
         ),
         content_details: Google::Apis::YoutubeV3::LiveBroadcastContentDetails.new(
           enable_auto_start: true,
-          enable_auto_stop: true
+          enable_auto_stop: false
         )
       )
       result = client.insert_live_broadcast("snippet,status,contentDetails", broadcast)
@@ -62,6 +62,7 @@ module Youtube
 
       status = item.status.life_cycle_status.to_s
       return :live if status == "live"
+      return :broadcast_ended if status == "complete"
 
       stream_id = item.content_details&.bound_stream_id
       if stream_id.present?