Factory

1. Use Eloquent Factories only for tests.

2. Keep factories in the tests/Factories directory.

3. Don't use the HasFactory trait in Model classes, use Factory classes directly

4. Call Factory classes directly in tests: $user = UserFactory::new()->create([...]);

5. Factory::definition() should set a valid default state (if possible) or not set any valid state.

6. For states, implement separate methods:

   final class ArticleFactory extends Factory
   {
       /** @inheritDoc */
       public function definition(): array
       {
           return [
               'title' => $this->faker->sentence,
               'body' => $this->faker->paragraph,
           ];
       }
   
       public function draft(): self
       {
           return $this->state(['published_at' => null]);
       }
   
       public function published(): self
       {
           return $this->state([
               'published_at' => today(),
               'meta_description' => $this->faker->sentence,
           ]);
       }
   
       public function ofAnyValidState(): self
       {
           return $this->draft(); // or return a (random) valid state
       }
   }