issues/27: Harden ContentFilterDto query parsing; use DateTimeImmutable in UpdateTimestampTrait

src/Entity/Behavior/UpdateTimestampTrait.php

@@ -6,19 +6,24 @@ namespace App\Entity\Behavior;
 
 use Doctrine\ORM\Mapping as ORM;
 
+/**
+ * Требует у класса-сущности свойство `$updateAt` (mapped column).
+ *
+ * @property \DateTimeInterface|null $updateAt
+ */
 trait UpdateTimestampTrait
 {
     #[ORM\PrePersist]
     public function setInitialUpdateAt(): void
     {
         if ($this->updateAt === null) {
-            $this->updateAt = new \DateTime();
+            $this->updateAt = new \DateTimeImmutable();
         }
     }
 
     #[ORM\PreUpdate]
     public function refreshUpdateAt(): void
     {
-        $this->updateAt = new \DateTime();
+        $this->updateAt = new \DateTimeImmutable();
     }
 }