feat: timeline displaying assignments and dispositions

src/Entity/Destination.php

@@ -147,6 +147,19 @@ class Destination implements TimestampableEntityInterface, SoftDeletableEntityIn
         return $this->hotelCode;
     }
 
+    public function getHotelCodeNormalized(): ?string
+    {
+        if (null === $hotelCode = $this->hotelCode) {
+            return null;
+        }
+
+        if (str_starts_with($hotelCode, 'SER')) {
+            return substr($hotelCode, 2, 3);
+        }
+
+        return substr($hotelCode, 0, 3);
+    }
+
     public function setHotelCode(?string $hotelCode): static
     {
         $this->hotelCode = $hotelCode;