[CI Failure] Templates-BuildAndRunStarterTemplateBuiltInTest 'Build and archive test project' step fails with generic exit code 1, unrelated to PR changes

## Build Information

Build: https://github.com/microsoft/aspire/actions/runs/32329544217
Build error leg: Tests / Microsoft.EntityFrameworkCore.SqlServer / Microsoft.EntityFrameworkCore.SqlServer (windows-latest)
Pull request: #19336

## Error Message

```
Process completed with exit code 1. (Build and archive test project step failed; job logs unavailable: 'Failed to fetch logs for job'). PR only modifies Aspire.Hosting.Orchestrator/ParameterProcessor.cs and its unit tests, unrelated to the template build/archive pipeline.
```

## Description

Templates-BuildAndRunStarterTemplateBuiltInTest 'Build and archive test project' step fails with generic exit code 1, unrelated to PR changes

**Type**: infra-failure

## Occurrences

| Date | Build | Job | PR |
|------|-------|-----|----|
| 2026-08-20 | [32329544217](https://github.com/microsoft/aspire/actions/runs/32329544217) | Tests / Microsoft.EntityFrameworkCore.SqlServer / Microsoft.EntityFrameworkCore.SqlServer (windows-latest) | #19336 |

Start with workflow run 32329544217 and the Templates-BuildAndRunStarterTemplateBuiltInTest job, focusing on the failed “Build and archive test project” step on windows-latest. Job logs were unavailable in the report, so inspect the workflow configuration and reproduce the failure; done means identifying the cause and restoring a successful template build without being tied to PR #19336.

Written by the indexing model from the issue text.