fix: select RXTX channel by firmware family

tests/test_device_manager.py

@@ -19,6 +19,8 @@ class FakeTransport:
         # fail_next_write 触发时抛出的异常实例（默认 SDK 包装后的 TransportError；
         # 真实硬件路径常是 bleak 裸抛的 BleakError，测试可替换）
         self.fail_exc = TransportError("connection lost")
+        self.firmware_revision = "HM42_AIO_V1.0.9"
+        self.rxtx_uuid = "00001f1f-0000-1000-8000-00805f9b34fb"
 
     async def __aenter__(self):
         self.enters += 1
@@ -204,6 +206,8 @@ class TestStatus:
         assert s["connect_timeout"] == 90.0
         assert s["idle_timeout"] == 300.0
         assert s["idle_seconds"] is None  # 无先前活动；status 自身不得把读数归零
+        assert s["firmware_revision"] == "HM42_AIO_V1.0.9"
+        assert s["rxtx_uuid"].startswith("00001f1f")
         await m.close()
 
     @pytest.mark.asyncio