Using PortMappings in WSL.Container throws "incorrect parameter"

@florelis is already working on this.

Since Jul 6, 2026.

### Windows Version

Microsoft Windows [Version 10.0.26200.8655]

### WSL Version

2.9.3.0

### Are you using WSL 1 or WSL 2?

- [x] WSL 2
- [ ] WSL 1

### Kernel Version

Whatever runs WSLC

### Distro Version

Whatever runs WSLC

### Other Software

NuGet: Microsoft.WSL.Containers 2.9.3

### Repro Steps

```
var containerSettings = new ContainerSettings(ImageName)
{
Name = ContainerName,
EnableAutoRemove = true,
PortMappings = new List()
{
new (windowsPort: 8080,
containerPort: 8080,
protocol: PortProtocol.TCP),
},
};
container = session.CreateContainer(containerSettings);
```

The following does not throw any exception, though does not map ports either.

```
var containerSettings = new ContainerSettings(ImageName)
{
Name = ContainerName,
EnableAutoRemove = true,
};
container = session.CreateContainer(containerSettings);
```

### Expected Behavior

Something like

```
wslc --session MySession run --rm -p 8080:8080 --name MyContainer MyImage
```

### Actual Behavior

```
System.ArgumentException: 'The parameter is incorrect.

The parameter is incorrect.
'
```

### Diagnostic Logs

_No response_