Unit tests cover the CTA registry register/resolve/has/all behaviour
and the DatabasesCreateIndex action's name, scope, validation surface,
and not-implemented execute path. The e2e suite runs the full CRUD
lifecycle, dismiss, and CTA trigger paths against a real cloud project,
including authentication boundaries.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>