Tulis feature test yang menguji endpoint POST /api/products. Test harus memverifikasi:

1. Response status 201 saat data valid (name: "Mouse", price: 150000)
2. Response status 422 saat name kosong
3. Data tersimpan di database setelah request berhasil

Hint

• Feature test menguji endpoint API secara end-to-end.
• Gunakan $this->postJson(), assertStatus(), assertJsonStructure().
• $this->postJson("/api/products", $data)->assertStatus(201)->assertJsonPath("name", "Laptop");