fix: correctly apply due dates for contract and invoice upload reminders

src/Service/Common/TimelineFilterHandler.php

@@ -4,16 +4,16 @@ namespace App\Service\Common;
 
 use App\Model\AbstractFilterDto;
 use App\Model\TimelineFilterDto;
-use Carbon\CarbonPeriod;
+use Carbon\CarbonPeriodImmutable;
 
 class TimelineFilterHandler extends AbstractFilterHandler
 {
     protected string $namespace = 'filter:timeline';
     protected string $modelClass = TimelineFilterDto::class;
 
-    protected ?CarbonPeriod $period = null;
+    protected ?CarbonPeriodImmutable $period = null;
 
-    public function setPeriod(CarbonPeriod $period): void
+    public function setPeriod(CarbonPeriodImmutable $period): void
     {
         $this->period = $period;
     }
@@ -44,7 +44,7 @@ class TimelineFilterHandler extends AbstractFilterHandler
             $filterDto->setHotels($data['hotels']);
         }
 
-        $filterDto->setPeriod(new CarbonPeriod($periodFrom, $periodTo));
+        $filterDto->setPeriod(new CarbonPeriodImmutable($periodFrom, $periodTo));
 
         return $filterDto;
     }