Fix ExceptionListener for test env, remove broken CurrentDateDirectoryNamer, update schema

- ExceptionListener now only active in prod (skip dev AND test)
- Remove CurrentDateDirectoryNamer from vich_uploader config (class not available)
- Add test for test environment skip
- Update test DB schema for Event entity columns

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

tests/EventListener/ExceptionListenerTest.php

@@ -25,6 +25,19 @@ class ExceptionListenerTest extends TestCase
         self::assertNull($event->getResponse());
     }
 
+    public function testDoesNothingInTestEnvironment(): void
+    {
+        $twig = $this->createMock(Environment::class);
+        $twig->expects(self::never())->method('render');
+
+        $listener = new ExceptionListener($twig, 'test');
+        $event = $this->createEvent(new \RuntimeException('test'));
+
+        $listener($event);
+
+        self::assertNull($event->getResponse());
+    }
+
     public function testRenders404Template(): void
     {
         $twig = $this->createMock(Environment::class);