Show periodic rclone progress and remote verification phases

etc/app-backup/app-backup.conf

@@ -29,6 +29,8 @@ RCLONE_LOW_LEVEL_RETRIES=20
 RCLONE_RETRIES_SLEEP="30s"
 RCLONE_TIMEOUT="1h"
 RCLONE_CONTIMEOUT="30s"
+# Periodic transfer/check statistics in journald, including otherwise quiet uploads.
+RCLONE_STATS_INTERVAL="1m"
 RCLONE_TRANSFERS=2
 RCLONE_CHECKERS=4
 # OneDrive chunks must be multiples of 320 KiB; 80 MiB satisfies this.