Preserva drain/offline su home e genera slate offline nel cloud-init.

Evita che ensure_home_from_env! annulli il drain a ogni allocate, e prepara /slates/offline.mp4 sul nodo Cloud per create_path MediaMTX.

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

backend/app/services/streams/node_registry.rb

@@ -11,10 +11,9 @@ module Streams
     class << self
       def ensure_home_from_env!
         StreamNode.find_or_initialize_by(slug: HOME_SLUG).tap do |node|
-          node.assign_attributes(
+          attrs = {
             hostname: home_hostname,
             role: "home",
-            status: "ready",
             provider: "local",
             rtmp_base_url: MatchLiveTv.mediamtx_rtmp_url,
             hls_base_url: MatchLiveTv.hls_public_url,
@@ -23,7 +22,10 @@ module Streams
             internal_hls_url: ENV.fetch("MEDIAMTX_HLS_URL", "http://mediamtx:8888"),
             max_publishers: ENV.fetch("STREAM_NODE_HOME_MAX_PUBLISHERS", "6").to_i,
             max_relays: ENV.fetch("STREAM_NODE_HOME_MAX_RELAYS", "6").to_i
-          )
+          }
+          # Non sovrascrivere drain/offline/error (ops) a ogni allocate!
+          attrs[:status] = "ready" if node.new_record? || !%w[draining offline error].include?(node.status)
+          node.assign_attributes(attrs)
           node.save!
         end
       end