- Fix state_key format: try @user:domain:DEVICE_ID (Element Call format),
then @user:domain, then scan all room state as fallback
- Publish bot E2EE key to room so Element shows encrypted status
- Extract caller device_id from call member event content
- Also fix pipecat-poc pipeline with context aggregators (CF-1579)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
