Fix email attachment handling in address import reports

Updated attachment logic to use in-memory file contents and apply a `.gz` suffix to filenames. This ensures better file handling and resolves potential issues with attaching files directly from a path.

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

@@ -311,7 +311,7 @@ final class AddressReferenceBaseImporter
                 $email = (new Email())
                     ->addTo($sendAddressReportToEmail)
                     ->subject('Addresses that could not be imported')
-                    ->attachFromPath($attachmentPath);
+                    ->attach(file_get_contents($attachmentPath), sprintf('%s.gz', $path));
 
                 try {
                     $this->mailer->send($email);