CI cache compatibility experiment

Workflow runs for CI cache compatibility experiment

• Isolate Apple CLI boundary fixtures from CI pkg-config

  completed successfully:
  CI cache compatibility experiment#2:Commite54a1cfpushedbyRCmerci
  codex/ci-cache-compatibility-20261016

  Oct 16, 202629m 2s
  More actions for workflow run 2

• Exercise CI cache across real SQLite providers

  failed:
  CI cache compatibility experiment#1:Commit4176457pushedbyRCmerci
  codex/ci-cache-compatibility-20261016

  Oct 16, 202616m 23s
  More actions for workflow run 1