fix(goLive): remove syncStream — synthetic PTS timebases make A/V sync deadlock

Symptom: video plays ~1s then freezes. BaseMediaStream sync logic:
- video _pts advances 33.3ms/frame (timeBase 1/fps), audio _pts advances
  20ms/packet (timeBase 1/48000) — two synthetic frame-index timebases that
  never share a clock.
- If audio starts late (ffmpeg audio init / Ogg header), ptsDelta = video-audio
  stays positive → isAhead() true → video loops 'await sleep(frametime) while
  isAhead()' → video freezes. Downchain: vPipe fills → proc.stdout paused →
  demuxer emits ~15fps (log: 30 frames per 2s).

Upstream dank sets syncStream because node-av provides REAL PTS from NUT in a
consistent timebase. Our raw-h264 demuxer has no real PTS; per-stream sleep-PTS
pacing alone keeps both at 1000ms/s, which is correct without a shared clock.
Re-enable sync only if real PTS is added.

services/discord-gateway/src/goLive/prepareStream.ts

@@ -369,10 +369,15 @@ export async function playStream(
     console.log(
       `[goLive:playStream] audio stream attached (${audio.codecName})`,
     );
-    // A/V sync (faithful to @dank074 newApi.js): audio is the master clock.
-    // Video sleeps/wakes based on ptsDelta(video - audio) so they can't drift
-    // apart under variable encoder throughput.
-    vStream.syncStream = aStream;
+    // NOTE: NO syncStream wiring here. Upstream dank sets
+    // `vStream.syncStream = aStream` because node-av provides real PTS from the
+    // NUT container, so ptsDelta() is meaningful (both streams in media time).
+    // Our raw-h264 demuxer synthesizes PTS per-stream from frame indexes in
+    // DIFFERENT timebases (video 1/fps, audio 1/48000). If audio starts late
+    // (ffmpeg audio init, Ogg header), ptsDelta stays positive forever →
+    // isAhead() → video sleeps in a loop → video freezes after ~1s. Per-stream
+    // sleep-PTS pacing alone keeps both at 1000ms/s, which is correct without
+    // a shared clock. (If real PTS is ever added, re-enable syncStream.)
   }
 
   const cleanup = () => {