Previous fix applied the decided_at branch to all status groups,
causing open decisions without decided_at (e.g. COULOMBCORE decision)
to sort last behind any open decision that had decided_at set.
Now: decided_at desc only for resolved/superseded; open/escalated
use deadline asc → created_at desc.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>