[Kinflou]

The live CLI reference showed {% for row in global_flags %}| {{ row.flag }} | {{ row.effect }} | instead of the global flags table. The site is built with zensical, which doesn't run the macros plugin, and --strict didn't notice.

• reference/cli.md: the four global flags are written out as a plain table. It was the only page using macros.
• Removed docs/_data/cli-global-flags.yaml, the macros plugin config and its mkdocs-macros-plugin dependency (poetry.lock re-locked). check-cli-drift.py now reads only the page, and cli-drift.yml no longer watches the YAML.
• New guard in docs.yml: after the build, any {{ or {% left in a built page fails it. With the old page restored, the guard fires on reference/cli/index.html. With the fix, the site is clean.

Checked locally: the strict build passes, search.json is still produced, and check-cli-drift.py reports no drift against comline 0.2.0.