GitCafe Buildkite qualification

A harmless public fixture for checking GitCafe's Buildkite observations and terminal log rendering. It contains no dependencies, credentials or project source. The job only prints a few lines and exits in under a second after checkout.

Run locally with bash .buildkite/verify.sh. The default result is recorded in .buildkite/expected-result; change pass to fail to qualify a failing commit. CI_FIXTURE_RESULT=fail bash .buildkite/verify.sh also exercises the intentional failure (exit 23).

The output includes ANSI colors, carriage-return progress, stderr, Unicode, and explicit final pass/fail text. No environment variables are dumped and no network requests are made by the job.