DeleteZombieCommentsRefs: add a logging statement of the deleted drafts

Change-Id: I8d117211900e072344120d75597a46d886d821c3
Release-Notes: skip
FW-COMPATIBLE: checked
Googlg-Bug-Id: b/207614518

java/com/google/gerrit/server/notedb/DeleteZombieCommentsRefs.java

diff --git a/java/com/google/gerrit/server/notedb/DeleteZombieCommentsRefs.java b/java/com/google/gerrit/server/notedb/DeleteZombieCommentsRefs.java
index 556f42f..0d95a26 100644
--- a/java/com/google/gerrit/server/notedb/DeleteZombieCommentsRefs.java
+++ b/java/com/google/gerrit/server/notedb/DeleteZombieCommentsRefs.java
@@ -284,6 +284,9 @@
         changeUpdateFactory.create(changeNotes, userFactory.create(accountId), TimeUtil.now());
     draftsToDelete.forEach(c -> changeUpdate.deleteComment(c));
     changeUpdate.commit();
+    logger.atInfo().log(
+        "Deleted zombie draft comments with UUIDs %s",
+        draftsToDelete.stream().map(d -> d.key.uuid).collect(Collectors.toList()));
   }
 
   /**