Updated VisitRepository::findUnlocatedVisits methods so that it paginates the amount of elements loaded in memory

module/Common/src/Paginator/ImplicitLoopPaginator.php

@@ -0,0 +1,38 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Common\Paginator;
+
+use IteratorAggregate;
+use Zend\Paginator\Paginator;
+
+class ImplicitLoopPaginator implements IteratorAggregate
+{
+    /** @var Paginator */
+    private $paginator;
+    /** @var callable */
+    private $valueParser;
+
+    public function __construct(Paginator $paginator, callable $valueParser = null)
+    {
+        $this->paginator = $paginator;
+        $this->valueParser = $valueParser ?? function ($value) {
+            return $value;
+        };
+    }
+
+    public function getIterator(): iterable
+    {
+        $totalPages = $this->paginator->count();
+        $processedPages = 0;
+
+        do {
+            $processedPages++;
+            $this->paginator->setCurrentPageNumber($processedPages);
+
+            foreach ($this->paginator as $key => $value) {
+                yield $key => ($this->valueParser)($value);
+            }
+        } while ($processedPages < $totalPages);
+    }
+}