init: early USB logging + wait for any DRM card + 5s timeout
- Mount USB early in init so we get logs even when ac-native fails
- Wait for card0 OR card1 (simpledrm may use card1)
- Extend wait to 5s for slower GPU probes
- Log available devices for debugging
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>