Authenticates an optional MediaMTX publish attempt using the owner's stream key.
MediaMTX sends JSON including path (e.g. live/<streamKey>).
On successful publish auth, starts the RTSP→PCM puller when RTSP base is configured
so OBS audio reaches the same enqueueOwnerPcm path as browser Add audio.
Authenticates an optional MediaMTX publish attempt using the owner's stream key. MediaMTX sends JSON including
path(e.g.live/<streamKey>). On successful publish auth, starts the RTSP→PCM puller when RTSP base is configured so OBS audio reaches the sameenqueueOwnerPcmpath as browser Add audio.