feat: refresh existing snapshots from XML after sync

src/BusProNet/XmlLoader/TravelLoader.php

@@ -102,7 +102,7 @@ class TravelLoader extends AbstractLoader
                 return $mapping;
             });
         } catch (InvalidArgumentException $e) {
-            return [];
+            throw new \RuntimeException('Cache key error in generateFilesMap', 0, $e);
         }
     }