Pulls in zebra-report 1ed5263: every entry now emits a one-shot
'session: ua=... ctx={...} devs={...} picked={...}' line so the
signal-server log carries browser + audioCtx + device-count + saved-
deviceId-shortprefix context for diagnosing the open tickets
(0001 fedora chrome silence, 0002 fedora firefox cannot share camera).
Camera-open errors now include e.name + the constraints we tried
plus auto-recovery from OverconstrainedError + saved deviceId.
russell@unturf.com
8e762fb100