feat: add AssetItem.purchaseOrderId (nullable FK)

src/app/api/assets/route.ts

@@ -22,12 +22,14 @@ export async function POST(request: Request): Promise<NextResponse> {
     return NextResponse.json({ error: "Request body must be a JSON object" }, { status: 400 });
   }
 
-  const { serialNumber, model, purchaseDate, warrantyEndDate } = body as Record<string, unknown>;
+  const { serialNumber, model, purchaseDate, warrantyEndDate, purchaseOrderId } =
+    body as Record<string, unknown>;
   const validation = validateCreateAssetItemInput({
     serialNumber,
     model,
     purchaseDate,
     warrantyEndDate,
+    purchaseOrderId,
   });
 
   if (!validation.ok) {