Calls connect but no participant can unmute, and the SFU log shows not a single
published track. v0.5.0 is the first production image carrying the AI noise
suppression code in the audio capture path, and v0.4.3 is the last image calls
demonstrably worked on. Restoring service first; the cause is still open.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>