Add Terms and Conditions and marketing opt-in checkboxes to registration

Registration now requires agreeing to the Terms and Conditions and lets
users opt in to hear about future projects. The opt-in is persisted on
the user via a new marketing_opt_in column (migration included).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/Tech/Entity/User.php

@@ -39,6 +39,9 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     #[ORM\Column(type: 'boolean')]
     private bool $isVerified = false;
 
+    #[ORM\Column(type: 'boolean')]
+    private bool $marketingOptIn = false;
+
     public function getId(): ?int
     {
         return $this->id;
@@ -137,4 +140,16 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
 
         return $this;
     }
+
+    public function isMarketingOptIn(): bool
+    {
+        return $this->marketingOptIn;
+    }
+
+    public function setMarketingOptIn(bool $marketingOptIn): static
+    {
+        $this->marketingOptIn = $marketingOptIn;
+
+        return $this;
+    }
 }

src/Tech/Form/RegistrationFormType.php

@@ -6,12 +6,14 @@ use App\Tech\Entity\User;
 use Karser\Recaptcha3Bundle\Form\Recaptcha3Type;
 use Karser\Recaptcha3Bundle\Validator\Constraints\Recaptcha3;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
 use Symfony\Component\Form\Extension\Core\Type\EmailType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\Extension\Core\Type\PasswordType;
 use Symfony\Component\Form\Extension\Core\Type\RepeatedType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\IsTrue;
 use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NotBlank;
 
@@ -42,6 +44,17 @@ class RegistrationFormType extends AbstractType
                     ),
                 ],
             ])
+            ->add('agreeTerms', CheckboxType::class, [
+                'mapped' => false,
+                'label' => 'I agree to the Terms and Conditions',
+                'constraints' => [
+                    new IsTrue(message: 'You must agree to the Terms and Conditions.'),
+                ],
+            ])
+            ->add('marketingOptIn', CheckboxType::class, [
+                'required' => false,
+                'label' => 'Keep me informed about future projects and updates',
+            ])
             ->add('captcha', Recaptcha3Type::class, [
                 'constraints' => new Recaptcha3(),
                 'action_name' => 'registration',