c972af2690
The TypeScript-typecheck job intermittently failed at 'Cache npm download cache' (transient cache-backend hiccup), which skipped install + type check and marked the run red — 3x during the issues+systems build, all on pushes the cache step had no bearing on. continue-on-error: true degrades a cache failure to 'install without cache' instead of failing the job. Closes the rerun churn from task #828. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>