feat: entité DomainEmail liée à Domain avec migration

Entity DomainEmail :
- domain (ManyToOne, CASCADE) : domaine parent
- name : partie locale de l'email (lowercase auto, ex: contact)
- state : active/suspended/disabled (défaut active)
- quotaMb : quota en Mo (défaut 5120 = 5 Go)
- createdAt / updatedAt : timestamps (updatedAt auto sur setState)
- getFullEmail() : retourne name@domain.fqdn
- isActive() : vérifie si state === active

DomainEmailTest (3 tests, 19 assertions) :
- testConstructor : valeurs par défaut, name lowercase/trim, fullEmail
- testSetters : name, quotaMb, updatedAt
- testState : active→suspended→disabled, updatedAt mis à jour

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

tests/Entity/DomainEmailTest.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\Tests\Entity;
+
+use App\Entity\Customer;
+use App\Entity\Domain;
+use App\Entity\DomainEmail;
+use App\Entity\User;
+use PHPUnit\Framework\TestCase;
+
+class DomainEmailTest extends TestCase
+{
+    private function createDomain(): Domain
+    {
+        $user = new User();
+        $user->setEmail('c@t.com');
+        $user->setFirstName('C');
+        $user->setLastName('T');
+        $user->setPassword('h');
+
+        return new Domain(new Customer($user), 'siteconseil.fr');
+    }
+
+    public function testConstructor(): void
+    {
+        $domain = $this->createDomain();
+        $email = new DomainEmail($domain, ' Contact ');
+
+        $this->assertNull($email->getId());
+        $this->assertSame($domain, $email->getDomain());
+        $this->assertSame('contact', $email->getName());
+        $this->assertSame('contact@siteconseil.fr', $email->getFullEmail());
+        $this->assertSame(DomainEmail::STATE_ACTIVE, $email->getState());
+        $this->assertTrue($email->isActive());
+        $this->assertSame(5120, $email->getQuotaMb());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $email->getCreatedAt());
+        $this->assertNull($email->getUpdatedAt());
+    }
+
+    public function testSetters(): void
+    {
+        $email = new DomainEmail($this->createDomain(), 'info');
+
+        $email->setName(' Support ');
+        $this->assertSame('support', $email->getName());
+        $this->assertSame('support@siteconseil.fr', $email->getFullEmail());
+
+        $email->setQuotaMb(10240);
+        $this->assertSame(10240, $email->getQuotaMb());
+
+        $now = new \DateTimeImmutable();
+        $email->setUpdatedAt($now);
+        $this->assertSame($now, $email->getUpdatedAt());
+    }
+
+    public function testState(): void
+    {
+        $email = new DomainEmail($this->createDomain(), 'test');
+
+        $this->assertTrue($email->isActive());
+
+        $email->setState(DomainEmail::STATE_SUSPENDED);
+        $this->assertSame(DomainEmail::STATE_SUSPENDED, $email->getState());
+        $this->assertFalse($email->isActive());
+        $this->assertInstanceOf(\DateTimeImmutable::class, $email->getUpdatedAt());
+
+        $email->setState(DomainEmail::STATE_DISABLED);
+        $this->assertSame(DomainEmail::STATE_DISABLED, $email->getState());
+        $this->assertFalse($email->isActive());
+    }
+}