chore: add log for max files size in batchDownloads

Co-authored-by: Maxime Vanza Lutonda <[email protected]>

datashare-app/src/main/java/org/icij/datashare/tasks/BatchDownloadRunner.java

@@ -106,6 +106,7 @@ public UriResult call() throws Exception {
                         maxResultSize, batchDownload.uuid, batchDownload.user);
             }
 
+            logger.info("creating zip file with max input files size of {} bytes", maxZipSizeBytes);
             try (Zipper zipper = createZipper(batchDownload, propertiesProvider, mailSenderSupplier)) {
                 HashMap<String, Object> taskProperties = new HashMap<>();
                 taskProperties.put("batchDownload", batchDownload);