implement uuid and make sample data factory

device-app/database/factories/PurchasingInformationFactory.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\PurchasingInformation>
+ */
+class PurchasingInformationFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'price' => $this->faker->word(),
+            'timestamp_warranty_end' => $this->faker->unixTime(),
+            'timestamp_purchase' => $this->faker->unixTime(),
+            'cost_centre' => $this->faker->numberBetween(1000000000, 9999999999),
+            'seller' => $this->faker->company()
+        ];
+    }
+}