- 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>