Native C candidate tests

Workflow runs for Native C candidate tests

• Tighten native references and ASCII folding; fix strict Clang build

  completed successfully:
  Native C candidate tests#2:Commit4c17d9dpushedbyastrobleem
  cuepull32-candidate

  Oct 14, 20265m 23s
  More actions for workflow run 2

• Add unreleased portable C CuePull32 candidate and legacy Win32 frontend

  failed:
  Native C candidate tests#1:Commitd6f302cpushedbyastrobleem
  cuepull32-candidate

  Oct 14, 202645s
  More actions for workflow run 1