feat: answer received form submissions by mail

migrations/Version20260924120000.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * The one payload field a rule depends on: whether the form reported an EU (incl. Switzerland)
+ * nationality. Nullable with three meanings - true, false, and "this form does not ask" - because
+ * only true earns the automatic receipt mail.
+ *
+ * Hand-written rather than generated, like the other two: doctrine:migrations:diff also sweeps in
+ * the long-standing dev drift and tables from other branches.
+ */
+final class Version20260924120000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add the eu eligibility flag to application_form_submission';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE application_form_submission ADD eu TINYINT DEFAULT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE application_form_submission DROP eu');
+    }
+}