nitro build OOM'd on the runner (exit 134, "ineffective mark-compacts near heap limit") — Node's default ~2GB heap was exceeded as the build grew. Runner has 7GB RAM, so raise --max-old-space-size to 4096. This unblocks the backend deploy (IMAP crash + dm-push fixes). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>