Fixed short codes DB length too short

module/Core/src/Entity/ShortUrl.php

@@ -29,7 +29,7 @@ class ShortUrl extends AbstractEntity implements \JsonSerializable
      *     name="short_code",
      *     type="string",
      *     nullable=false,
-     *     length=10,
+     *     length=255,
      *     unique=true
      * )
      */

module/Core/test-func/Repository/ShortUrlRepositoryTest.php

@@ -38,7 +38,7 @@ class ShortUrlRepositoryTest extends DatabaseTestCase
 
         $bar = new ShortUrl();
         $bar->setOriginalUrl('bar')
-            ->setShortCode('bar')
+            ->setShortCode('bar_very_long_text')
             ->setValidSince((new \DateTime())->add(new \DateInterval('P1M')));
         $this->getEntityManager()->persist($bar);