DX: improve import command + help for address-ref-from-best-addresses

src/Bundle/ChillMainBundle/Service/Import/PostalCodeBEFromBestAddress.php

@@ -97,8 +97,8 @@ class PostalCodeBEFromBestAddress
             trim($record['postal_info_objectid']),
             $record['municipality_objectid'],
             'bestaddress',
-            $record['Y'],
-            $record['X'],
+            (float) $record['Y'],
+            (float) $record['X'],
             3812
         );
     }