[CI Failure] Flaky: InternalMicrosoftDetectorTests.CheckCopilotCliAsync_UsesOverallGitHubTokenCandidateTimeout fails intermittently on Windows runner

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/31417495072
Build error leg or test failing: Tests / Cli / Cli (windows-latest) / `Aspire.Cli.Tests.Telemetry.InternalMicrosoftDetectorTests.CheckCopilotCliAsync_UsesOverallGitHubTokenCandidateTimeout`
Pull request: #19193

## Error Message

```
Assert.True() Failure
Expected: True
Actual: False
at Aspire.Cli.Tests.Telemetry.InternalMicrosoftDetectorTests.CheckCopilotCliAsync_UsesOverallGitHubTokenCandidateTimeout() in D:\a\aspire\aspire\tests\Aspire.Cli.Tests\Telemetry\InternalMicrosoftDetectorTests.cs:line 495
```

## Description

Flaky: InternalMicrosoftDetectorTests.CheckCopilotCliAsync_UsesOverallGitHubTokenCandidateTimeout fails intermittently on Windows runner

**Type**: flaky-test

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-08-10 | [31417495072](https://github.com/microsoft/aspire/actions/runs/31417495072) | Tests / Cli / Cli (windows-latest) | #19193 |

Start with tests/Aspire.Cli.Tests/Telemetry/InternalMicrosoftDetectorTests.cs, especially CheckCopilotCliAsync_UsesOverallGitHubTokenCandidateTimeout at line 495, and review the linked Windows CI run and PR #19193. Reproduce the test on the Windows runner and investigate the intermittent assertion; done means the test passes reliably there.

Written by the indexing model from the issue text.