chore: update spec.types.ts from upstream - #2027

This push did not change the pull request's own code (it only updated the base branch underneath it, rewrote the branch's history, or added an empty commit), so the earlier review still applies and its blocking findings are still open. See that review's comments on this pull request for what to fix. A new review starts on the next push that changes the pull request's code, or on any push after one of those finding threads is resolved. To review this commit now, comment @claude review on the pull request, or click Re-run on this check.