[Bug Report] ClassCastException: class com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection cannot be cast to class com.microsoft.azure.sdk.iot.device.transport.amqps.AmqpsIotHubConnection

# Context

- **OS and version used:** amazoncorretto:25-alpine-jdk (Dockerfile)
- **Java runtime used:** 25.0.2
- **SDK version used:** 2.5.1

## Description of the issue

We have some DeviceClients - using the IotHubClientProtocol.MQTT - that connects, sends and close their connection afterwards.

In case the IoTHub is not available at the moment that DeviceClients try to reconnect to it causing the following exception:

```
java.lang.ClassCastException: class com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection cannot be cast to class com.microsoft.azure.sdk.iot.device.transport.amqps.AmqpsIotHubConnection (com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection and com.microsoft.azure.sdk.iot.device.transport.amqps.AmqpsIotHubConnection are in unnamed module of loader org.springframework.boot.loader.launch.LaunchedClassLoader @3c27f72)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.singleDeviceReconnectAttemptAsync(IotHubTransport.java:1464)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.reconnect(IotHubTransport.java:649)
at com.microsoft.azure.sdk.iot.device.transport.IotHubReconnectTask.run(IotHubReconnectTask.java:94)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:545)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:369)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:310)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
at java.base/java.lang.Thread.run(Thread.java:1474)
```

Since the IoTHub is seldom out of order we do not see that exception very often. But when it is there are a lot of devices that try to reconnect causing a lot of exceptions for a very short time range.

Start in IotHubTransport.java at singleDeviceReconnectAttemptAsync (line 1464 in the reported stack trace), then trace how reconnect handles an MQTT DeviceClient when IoT Hub is unavailable. The report provides no test file; look for existing reconnect tests and run the relevant ones. Done means the reported MQTT reconnect scenario no longer throws this ClassCastException.

Written by the indexing model from the issue text.