NativeClient::mic_stats reaches the per-second stream window: sent and
dropped (queue-full + stale-shed) frame deltas join the tracing line and
the Stats event, and the Detailed OSD tier renders a mic line while the
uplink is live — a healthy 10 ms-frame mic reads ~100 f/s, and a drop
term means the client is shedding backlog, not the network eating audio.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>