feat: Add TURN server support

toju-app/src/app/infrastructure/realtime/media/noise-reduction.manager.ts

@@ -7,9 +7,9 @@
  * a clean output stream that can be sent to peers instead.
  *
  * Architecture:
- *   raw mic → AudioContext.createMediaStreamSource
- *             → NoiseSuppressorWorklet (AudioWorkletNode)
- *             → MediaStreamDestination → clean MediaStream
+ *   raw mic -> AudioContext.createMediaStreamSource
+ *             -> NoiseSuppressorWorklet (AudioWorkletNode)
+ *             -> MediaStreamDestination -> clean MediaStream
  *
  * The manager is intentionally stateless w.r.t. Angular signals;
  * the owning MediaManager / WebRTCService drives signals.
@@ -138,7 +138,7 @@ export class NoiseReductionManager {
 
   /**
    * Build the AudioWorklet processing graph:
-   *   rawStream → source → workletNode → destination
+   *   rawStream -> source -> workletNode -> destination
    */
   private async buildProcessingGraph(rawStream: MediaStream): Promise<void> {
     // Reuse or create the AudioContext (must be 48 kHz for RNNoise)