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_online.rb

@@ -4,17 +4,37 @@ module Mediamtx
     module_function
 
     def active?(session)
+      return true if rtmp_publisher?(session)
+
       active_path?(path_info(session))
     end
 
     def path_info(session)
-      Client.new.list_paths.find { |i| i["name"] == session.mediamtx_path_name }
+      Client.for_session(session).list_paths.find { |i| i["name"] == session.mediamtx_path_name }
     end
 
+    # MediaMTX <=1.19: online + source.type=rtmpConn.
+    # MediaMTX 1.20+: online/source spesso null anche con publisher; usare rtmpconns.
     def active_path?(info)
       return false unless info
+      return true if info["online"] == true && rtmp_source?(info.dig("source", "type"))
 
-      info["online"] == true && info.dig("source", "type") == "rtmpConn"
+      false
+    end
+
+    def rtmp_publisher?(session)
+      path = session.mediamtx_path_name.to_s
+      return false if path.blank?
+
+      Client.for_session(session).list_rtmp_conns.any? do |conn|
+        conn_path = conn["path"].to_s.sub(%r{\A/}, "")
+        next false unless conn_path == path
+
+        state = conn["state"].to_s
+        state.empty? || state == "publish" || state == "idle"
+      end
+    rescue StandardError
+      false
     end
 
     def h264_video?(info)
@@ -26,12 +46,14 @@ module Mediamtx
     end
 
     def video_publishing?(session)
-      info = path_info(session)
-      return false unless active_path?(info)
-      # Slate alwaysAvailable ha H264 ma non è il telefono.
-      return false unless info.dig("source", "type") == "rtmpConn"
+      return false unless active?(session)
 
+      info = path_info(session)
       h264_video?(info)
     end
+
+    def rtmp_source?(type)
+      type.to_s.match?(/\Artmps?Conn\z/)
+    end
   end
 end