CI flake: csharp-testsuite #6017

Detected by CI Gremlin after a failed GitHub Actions attempt succeeded on rerun.

Tests:

• csharp-testsuite

Error:
Error: command ["dotnet", "publish", "StdbModule.csproj", "-c", "Release", "-f", "net10.0", "-v", "quiet"] exited with code 1
2026-09-29T21:37:06.0743611Z

Failed job runs:

• https://github.com/clockworklabs/SpacetimeDB/actions/runs/36628619319/job/109619877279 (csharp-testsuite, attempt 1 -> 2)

Timeout detection:

• none

Context:

• none