Make BilletBuyer firstName, lastName, email nullable for guest checkout flow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

migrations/Version20260321260000.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260321260000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Make firstName, lastName, email nullable on billet_buyer for guest orders';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN first_name DROP NOT NULL');
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN last_name DROP NOT NULL');
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN email DROP NOT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql("UPDATE billet_buyer SET first_name = '' WHERE first_name IS NULL");
+        $this->addSql("UPDATE billet_buyer SET last_name = '' WHERE last_name IS NULL");
+        $this->addSql("UPDATE billet_buyer SET email = '' WHERE email IS NULL");
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN first_name SET NOT NULL');
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN last_name SET NOT NULL');
+        $this->addSql('ALTER TABLE billet_buyer ALTER COLUMN email SET NOT NULL');
+    }
+}