[CI Failure] Flaky: ResourceLoggerForwarderServiceTests.ExecuteDoesNotThrowOperationCanceledWhenAppStoppingTokenSignaled times out intermittently on Windows

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/30416905407
Build error leg or test failing: Tests / Hosting.Testing / Hosting.Testing (windows-latest) / `Aspire.Hosting.Testing.Tests.ResourceLoggerForwarderServiceTests.ExecuteDoesNotThrowOperationCanceledWhenAppStoppingTokenSignaled`
Pull request: #18561

## Error Message

```
System.TimeoutException : The operation has timed out.
at Aspire.Hosting.Testing.Tests.ResourceLoggerForwarderServiceTests.ExecuteDoesNotThrowOperationCanceledWhenAppStoppingTokenSignaled() in /_/tests/Aspire.Hosting.Testing.Tests/ResourceLoggerForwarderServiceTests.cs:line 59
```

## Description

Flaky: ResourceLoggerForwarderServiceTests.ExecuteDoesNotThrowOperationCanceledWhenAppStoppingTokenSignaled times out intermittently on Windows

**Type**: flaky-test

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-07-29 | [30416905407](https://github.com/microsoft/aspire/actions/runs/30416905407) | Tests / Hosting.Testing / Hosting.Testing (windows-latest) | #18561 |

Start with tests/Aspire.Hosting.Testing.Tests/ResourceLoggerForwarderServiceTests.cs at line 59 and the named test, then reproduce it on the windows-latest test job. Review the timeout around app-stopping token signaling. Done means the test completes reliably on Windows and continues verifying that Execute does not throw OperationCanceledException.

Written by the indexing model from the issue text.