feat(solo): orderBy taken per PBI-hiërarchie

Voeg pbi.priority en pbi.sort_order toe aan de task.findMany orderBy in de solo-page query zodat taken per PBI gegroepeerd worden vóór story- en task-volgorde.

app/(app)/products/[id]/solo/page.tsx

@@ -50,6 +50,8 @@ export default async function SoloProductPage({ params }: Props) {
         },
       },
       orderBy: [
+        { story: { pbi: { priority: 'asc' } } },
+        { story: { pbi: { sort_order: 'asc' } } },
         { story: { sort_order: 'asc' } },
         { priority: 'asc' },
         { sort_order: 'asc' },