feat(cryptography): allow use of Stringable DataSubjectId

Author: wikando-ck

src/Cryptography/PersonalDataPayloadCryptographer.php

@@ -13,6 +13,7 @@
 use Patchlevel\Hydrator\Cryptography\Store\CipherKeyStore;
 use Patchlevel\Hydrator\Metadata\ClassMetadata;
 use Patchlevel\Hydrator\Metadata\PropertyMetadata;
+use Stringable;
 
 use function array_key_exists;
 use function is_int;
@@ -143,6 +144,10 @@ private function subjectId(ClassMetadata $metadata, array $data): string|null
             $subjectId = (string)$subjectId;
         }
 
+        if ($subjectId instanceof Stringable) {
+            $subjectId = $subjectId->__toString();
+        }
+
         if (!is_string($subjectId)) {
             throw new UnsupportedSubjectId($metadata->className(), $fieldName, $subjectId);
         }