Add audit system core with event handling and subject conversion

- Implemented `AuditEvent` class to represent audit events.
- Added `AuditEvent2Trail` for converting events to audit trails.
- Introduced `Subject` and `SubjectConverterManager` for subject conversion.
- Created contracts like `SubjectConverterInterface` and `AuditEvent2TrailInterface`.
- Developed `AuditEventSubscriber` to persist audit events using `AuditTrailPersister`.
- Included test classes for core audit services and components.

src/Bundle/ChillMainBundle/Audit/AuditEvent2Trail.php

@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\MainBundle\Audit;
+
+use Chill\MainBundle\Entity\AuditTrail;
+use Chill\MainBundle\Entity\User;
+use Ramsey\Uuid\Uuid;
+use Symfony\Component\Clock\ClockInterface;
+use Symfony\Component\Security\Core\Security;
+use Symfony\Contracts\Translation\TranslatableInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+final readonly class AuditEvent2Trail implements AuditEvent2TrailInterface
+{
+    public function __construct(
+        private TranslatorInterface $translator,
+        private SubjectConverterManagerInterface $subjectConverterManager,
+        private ClockInterface $clock,
+        private Security $security,
+    ) {}
+
+    public function convertToTrail(AuditEvent $event): AuditTrail
+    {
+        $description = $event->description instanceof TranslatableInterface ?
+            $event->description->trans($this->translator)
+            : $event->description;
+
+        $targets = array_map(fn (mixed $subject) => $this->subjectConverterManager->convertEntityToSubjects($subject), $event->subjects);
+
+        $user = $this->security->getUser();
+
+        return new AuditTrail(
+            Uuid::uuid7(),
+            $event->action,
+            $this->clock->now(),
+            $user instanceof User ? $user : null,
+            $description,
+            $targets,
+            $event->metadata,
+        );
+    }
+}