Bug: enableSFU: true default in v1.2.20 causes immediate disconnection loop

Problem

Upgrading from v1.2.11 to v1.2.20 breaks all connections. The client connects then immediately disconnects in a loop.

Reproduction

const client = new SimliClient();
client.Initialize({
  faceID: 'my-face-id',
  handleSilence: true,
  maxSessionLength: 3600,
  maxIdleTime: 600,
  enableConsoleLogs: false,
  videoRef: videoElement,
  audioRef: audioElement,
  session_token: 'valid-token',
});

await client.start(iceServers);
// Immediately disconnects after "connected" event

Console Output

SIMLI: [email protected] initialized
START
connected
disconnected  ← Immediate disconnect
START
connected
disconnected  ← Loops forever

Root Cause

v1.2.20 defaults enableSFU: true which is incompatible/broken.

Workaround

client.Initialize({
  // ... other config
  enableSFU: false  // Forces old MCU mode - works perfectly
});

Expected

• SFU mode should work without disconnections, OR
• Document breaking change in release notes, OR
• Default to enableSFU: false for backward compatibility

Environment

• Package: [email protected]
• Browsers: Chrome, Safari, Firefox (all affected)
• Works fine with: v1.2.11 or v1.2.20 + enableSFU: false