Alza soft capacity fase A e aggiunge quiet hours CPX notturne.

Home a 4 e cloud a 6 con MAX_NODES=12 (~76 soft); di notte (02–07 Europe/Rome) niente scale-out/warm-spare e sweeper che chiude i CPX idle.

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

backend/lib/tasks/streams_nodes.rake

@@ -1,6 +1,12 @@
 # frozen_string_literal: true
 
 namespace :streams do
+  desc "Chiude CPX cloud idle in quiet hours (02:00–07:00 Europe/Rome); alert se sessioni attive"
+  task night_cloud_sweep: :environment do
+    result = Streams::NightCloudSweeper.sweep!
+    puts "skipped=#{result.skipped} error=#{result.error} actions=#{result.actions.inspect}"
+  end
+
   namespace :nodes do
     desc "Assicura il nodo home dagli ENV MediaMTX"
     task ensure_home: :environment do