feat: Initial commit for Saqel Platform architecture, backend, Docker, and documentation

backend/database/factories/LessonFactory.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\Lesson;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends Factory<Lesson>
+ */
+class LessonFactory extends Factory
+{
+    public function definition(): array
+    {
+        return [
+            'course_id' => CourseFactory::new(),
+            'title' => fake()->sentence(4),
+            'order_index' => fake()->numberBetween(1, 100),
+            'video_id' => 'vid_'.fake()->unique()->uuid(),
+            'duration_seconds' => fake()->numberBetween(300, 3600),
+        ];
+    }
+}