YouTube live immediata: relay sempre attivo e attivazione broadcast.

Il relay parte dal job overlay ogni 2s; scheduledStartTime ~90s invece di 5 min;
transition testing/live quando l'ingest RTMP raggiunge YouTube.

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

backend/app/services/youtube/broadcast_service.rb

@@ -50,6 +50,28 @@ module Youtube
       raise Error, friendly_api_error(e)
     end
 
+    # Porta in onda appena c’è ingest su YouTube (non attendere scheduledStartTime).
+    def activate_broadcast!(broadcast_id)
+      return if broadcast_id.blank?
+      return if @credential.blank? || missing_oauth_config?
+
+      client = authorized_client
+      item = client.list_live_broadcasts("status", id: broadcast_id).items&.first
+      return unless item
+
+      status = item.status.life_cycle_status.to_s
+      return if status == "live"
+
+      if %w[ready created].include?(status)
+        client.transition_live_broadcast("testing", broadcast_id, "id,status")
+        status = "testing"
+      end
+      client.transition_live_broadcast("live", broadcast_id, "id,status") if status == "testing"
+    rescue Google::Apis::Error => e
+      Rails.logger.warn("[Youtube::BroadcastService] activate #{broadcast_id}: #{e.message}")
+      nil
+    end
+
     def complete_broadcast!(broadcast_id)
       return if broadcast_id.blank?
       return if @credential.blank? || missing_oauth_config?
@@ -100,10 +122,10 @@ module Youtube
       msg
     end
 
-    # YouTube richiede scheduledStartTime obbligatorio e nel futuro (non accetta date partita già passate).
+    # YouTube richiede scheduledStartTime nel futuro; per «vai subito» usiamo ~1 min (auto_start al RTMP).
     def normalize_scheduled_start_time(scheduled_at)
       now = Time.current.utc
-      minimum = now + 5.minutes
+      minimum = now + 90.seconds
       maximum = now + 7.days
 
       candidate =