add open orders api route

src/Repository/FoodOrderRepository.php

@@ -47,4 +47,19 @@ final class FoodOrderRepository extends ServiceEntityRepository
             ->filter(static fn(FoodOrder $order): bool => $order->getCreatedAt() >= $date)
             ->getValues();
     }
+
+    /**
+     * @return FoodOrder[]
+     */
+    public function findOpenOrders(): array
+    {
+        $now = new DateTimeImmutable;
+
+        return $this->createQueryBuilder('o')
+            ->where('o.closedAt IS NULL OR o.closedAt > :now')
+            ->setParameter('now', $now)
+            ->orderBy('o.id', 'DESC')
+            ->getQuery()
+            ->getResult();
+    }
 }