[CI Failure] Windows runner temp file command path inaccessible: 'A device which does not exist was specified'

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/30946837201
Build error leg: Tests / Hosting-4 / Hosting-4 (windows-latest)
Pull request: #18943

## Error Message

```
A device which does not exist was specified. : 'D:\a\_temp\_runner_file_commands\add_path_...'
D:\a\aspire\aspire\.dotnet\sdk\10.0.201\NuGet.targets(196,5): error : A device which does not exist was specified.
Build FAILED.
```

## Description

Windows runner temp file command path inaccessible: 'A device which does not exist was specified'

**Type**: infra-failure

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-08-04 | [30946837201](https://github.com/microsoft/aspire/actions/runs/30946837201) | Tests / Hosting-4 / Hosting-4 (windows-latest) | #18943 |

Start with build 30946837201 and the Tests / Hosting-4 / Hosting-4 (windows-latest) log, then inspect the failing .dotnet/sdk/10.0.201/NuGet.targets location and the runner temp-file command path shown in the error. Done means the Windows Hosting-4 job completes without the device-not-exist failure.

Written by the indexing model from the issue text.