feat(patient): add SessionAuditLog entity for financial/service change trail

New SessionAuditLog (mirrors AppointmentEvent): session FK, field, operation
(create/update/delete), old_value/new_value, actor id+name, note, created_at.
Repository saves and lists a session's history (newest first, array hydration).
Migration creates the table.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/Patient/Repository/SessionAuditLogRepository.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Patient\Repository;
+
+use App\Patient\Entity\SessionAuditLog;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+class SessionAuditLogRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry) { parent::__construct($registry, SessionAuditLog::class); }
+
+    public function save(SessionAuditLog $e, bool $flush = true): void
+    {
+        $this->getEntityManager()->persist($e);
+        if ($flush) {
+            $this->getEntityManager()->flush();
+        }
+    }
+
+    /** تاریخچه‌ی یک مراجعه (جدید → قدیم)، آرایه‌ای. */
+    public function findBySessionUuid(string $sessionUuid): array
+    {
+        return $this->createQueryBuilder('l')
+            ->select('l.field AS field', 'l.operation AS operation', 'l.oldValue AS old_value', 'l.newValue AS new_value', 'l.actorName AS actor_name', 'l.note AS note', 'l.createdAt AS created_at')
+            ->join('l.session', 's')
+            ->where('s.uuid = :uuid')->setParameter('uuid', $sessionUuid)
+            ->orderBy('l.createdAt', 'DESC')->addOrderBy('l.id', 'DESC')
+            ->getQuery()->getArrayResult();
+    }
+}