b98cceb8fb
New deployment/version-skew-protection page: the skew problem, the --external-id primitive and its reuse behaviour, runtime discovery (call option, configure(), TRIGGER_EXTERNAL_DEPLOYMENT_ID, and the gated platform/CI/generic commit-SHA variables with the build-time caveat), the manual any-platform recipe, waiting/expiry semantics, precedence, and automatic skew protection on Vercel. Deprecation callouts on the atomic deployments page and the Vercel integration page; --external-id/--force added to the CLI deploy reference; redirect from deployment/vercel-skew-protection so existing webapp links resolve (TRI-13002).