Today we realized than when we run tests in CI, for example [here](https://github.com/lockdown-systems/cyd/actions/runs/17010205685/job/48225198520?pr=562), `TypeError`s can occur, and will get posted on [PRs](https://github.com/lockdown-systems/cyd/pull/562/files#diff-fdbe1355571c87f1b198164a5da30694500c6b532e67249ee63a6d957ae3a0ba) but not fail the CI job. We should have these `TypeError`s fail the job.
