- ESP32Transport.send_command() injects v:1, fire-and-forget, silent drop if not ready
- 512-byte payload limit enforced with warning log
- datagram_received() parses STATUS ok → connected=True, stores last_status
- on_status callback support for status update notifications
- connection_lost() sets connected=False, clears transport ref
- create_esp32_transport() async factory sends initial STATUS ping (D-12)
- All protocol behaviors match docs/protocol.md exactly (D-10, D-11, D-12, D-14)
- Add pytest-asyncio to dev deps + asyncio_mode=auto for test suite
- Tests for send_command() v:1 injection, field preservation
- Tests for stop/brightness commands, pre-connection silent drop
- Tests for 512-byte payload limit enforcement
- Tests for STATUS ok response → connected=True + last_status
- Tests for malformed JSON silent handling, on_status callback
- Tests for send_status_ping, connection_lost, create_esp32_transport factory
- Tests for led_sync.transport package re-exports
