Fix LibreTranslate deploy: healthcheck from PHP container, ignore_errors, add QR code tests

- Ansible: healthcheck via PHP container (curl from php, not libretranslate)
- Ansible: exit 0 if LibreTranslate not ready (don't block deploy)
- Ansible: ignore_errors on translation step (non-blocking)
- AccountControllerTest: add testEventQrCode (PNG response) and testEventQrCodeDeniedForOtherUser (403)

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

tests/Controller/AccountControllerTest.php

@@ -1955,6 +1955,37 @@ class AccountControllerTest extends WebTestCase
         return $category;
     }
 
+    public function testEventQrCode(): void
+    {
+        $client = static::createClient();
+        $em = static::getContainer()->get(EntityManagerInterface::class);
+        $user = $this->createUser(['ROLE_ORGANIZER'], true);
+
+        $event = $this->createEvent($em, $user);
+
+        $client->loginUser($user);
+        $client->request('GET', '/mon-compte/evenement/'.$event->getId().'/qrcode');
+
+        self::assertResponseIsSuccessful();
+        self::assertSame('image/png', $client->getResponse()->headers->get('Content-Type'));
+        self::assertStringContainsString('attachment', $client->getResponse()->headers->get('Content-Disposition'));
+    }
+
+    public function testEventQrCodeDeniedForOtherUser(): void
+    {
+        $client = static::createClient();
+        $em = static::getContainer()->get(EntityManagerInterface::class);
+        $user = $this->createUser(['ROLE_ORGANIZER'], true);
+        $otherUser = $this->createUser(['ROLE_ORGANIZER'], true);
+
+        $event = $this->createEvent($em, $user);
+
+        $client->loginUser($otherUser);
+        $client->request('GET', '/mon-compte/evenement/'.$event->getId().'/qrcode');
+
+        self::assertResponseStatusCodeSame(403);
+    }
+
     public function testGetAllowedBilletTypesBasic(): void
     {
         $types = \App\Controller\AccountController::getAllowedBilletTypes('basic');