log the latest cached revision

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/history/FileHistoryCache.java

@@ -18,7 +18,7 @@
  */
 
 /*
- * Copyright (c) 2008, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2024, Oracle and/or its affiliates. All rights reserved.
  * Portions Copyright (c) 2018, 2020, Chris Fraire <[email protected]>.
  */
 package org.opengrok.indexer.history;
@@ -715,6 +715,7 @@ private void storeLatestCachedRevision(Repository repository, String rev) {
         Path newPath = Path.of(getRepositoryCachedRevPath(repository));
         try (Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newPath.toFile())))) {
             writer.write(rev);
+            LOGGER.finest(() -> String.format("stored latest cached revision %s for repository %s", rev, repository));
         } catch (IOException ex) {
             LOGGER.log(Level.WARNING,
                     String.format("Cannot write latest cached revision to file for repository %s", repository), ex);