Aggiunge replay YouTube temporaneo, pull registrazioni dai CPX e snapshot ingest in admin.

Così overflow Hetzner e VOD YouTube restano in archivio dopo lo spegnimento del nodo, e la colonna ingest non si svuota.

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

backend/app/services/sessions/create.rb

@@ -55,13 +55,15 @@ module Sessions
         )
       end
 
+      kick_autoscaler_if_soft_limit!
+
       if session.platform == "youtube"
         YoutubeBroadcastSetupJob.perform_later(session.id, youtube_channel)
       end
 
       session
     rescue Streams::NodeRegistry::NoCapacityError => e
-      raise Teams::EntitlementError.new(e.message, code: "stream_capacity_exhausted")
+      raise_no_capacity!(e)
     rescue Faraday::ConnectionFailed, Faraday::TimeoutError => e
       raise Streams::IngestUnavailableError, "Ingest temporaneamente non disponibile (#{e.class})"
     rescue Mediamtx::Client::Error => e
@@ -73,6 +75,28 @@ module Sessions
 
     private
 
+    def raise_no_capacity!(error)
+      if Streams::Autoscaler.enabled?
+        Streams::AutoscalerJob.kick!
+        raise Teams::EntitlementError.new(
+          "Capacità streaming in espansione. Riprova tra poco.",
+          code: "stream_capacity_scaling"
+        )
+      end
+
+      raise Teams::EntitlementError.new(error.message, code: "stream_capacity_exhausted")
+    end
+
+    def kick_autoscaler_if_soft_limit!
+      return unless Streams::Autoscaler.enabled?
+
+      free = Streams::Autoscaler.metrics[:free_slots].to_i
+      return if free > Streams::Autoscaler.soft_free_slots
+
+      Streams::AutoscalerJob.kick!
+    end
+
+
     def assert_youtube_channel!(youtube_channel)
       resolver = Youtube::CredentialResolver.new(@match.team, channel: youtube_channel)
       if resolver.resolve.blank?