Merge branch 'feature/adaptive-bitrate' into collaudo

Integra bitrate adattivo e telemetria, con il mute audio come icona nella toolbar della regia.

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

backend/app/services/sessions/pause.rb

@@ -9,11 +9,12 @@ module Sessions
       @session.pause! if @session.may_pause?
       Mediamtx::PublisherSync.forget_recording_state!(@session.id)
       begin
-        Mediamtx::Client.for_session(@session).set_path_recording(@session, enabled: false)
+        mtx = Mediamtx::Client.for_session(@session)
+        mtx.set_path_recording(@session, enabled: false)
+        mtx.set_always_available(@session, enabled: true)
       rescue Mediamtx::Client::Error => e
-        Rails.logger.warn("[Sessions::Pause] disable recording: #{e.message}")
+        Rails.logger.warn("[Sessions::Pause] MediaMTX: #{e.message}")
       end
-      Mediamtx::Client.for_session(@session).set_always_available(@session, enabled: true)
       # Slate su path per HLS in pausa; RTMP telefono si ferma via comando app.
       log_event("paused")
       SessionChannel.broadcast_message(@session, { type: "command", action: "pause_stream" })