-turn-url and -turn-secret flags on the daemon; credentials generated
using coturn use-auth-secret HMAC-SHA1 scheme (same as browser mode).
ICEServers field on mesh.Mesh threads extra ICE servers through to
every PeerConnection created by the anchor client.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
1308082c7b