Corregge cloud-init montato, PublisherOnline multi-nodo e E2E locale-aware.

Senza volume stream-node i nodi Hetzner nascevano senza MediaMTX; sync live usa ora Client.for_session e rtmpconns (MediaMTX 1.20).

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

backend/app/services/mediamtx/publisher_sync.rb

@@ -12,7 +12,7 @@ module Mediamtx
       return @session if @session.terminal?
 
       path_info = Mediamtx::PublisherOnline.path_info(@session)
-      publisher_online = Mediamtx::PublisherOnline.active_path?(path_info)
+      publisher_online = Mediamtx::PublisherOnline.active?(@session)
 
       if publisher_online
         clear_publisher_misses!(@session.id)
@@ -86,7 +86,7 @@ module Mediamtx
       key = format("youtube:slate_disabled:%s", session.id)
       return unless redis.set(key, "1", nx: true, ex: 48.hours.to_i)
 
-      Client.new.set_always_available(session, enabled: false)
+      Client.for_session(session).set_always_available(session, enabled: false)
     rescue Client::Error => e
       redis.del(format("youtube:slate_disabled:%s", session.id))
       Rails.logger.warn("[PublisherSync] disable slate session=#{session.id}: #{e.message}")
@@ -95,7 +95,7 @@ module Mediamtx
     def restore_slate_path!(session)
       return if session.platform == "matchlivetv"
 
-      Client.new.set_always_available(session, enabled: true)
+      Client.for_session(session).set_always_available(session, enabled: true)
     rescue Client::Error => e
       Rails.logger.warn("[PublisherSync] enable slate session=#{session.id}: #{e.message}")
     end
@@ -128,7 +128,7 @@ module Mediamtx
         return
       end
 
-      Client.new.set_path_recording(session, enabled: enabled)
+      Client.for_session(session).set_path_recording(session, enabled: enabled)
       redis.set(key, desired, ex: 48.hours.to_i)
       mark_recording_patch!(session.id)
     rescue Client::Error => e