Add comprehensive Plex backup management scripts

- Introduced `restore-plex.sh` for restoring Plex backups with logging and validation.
- Created `test-plex-backup.sh` for automated testing of backup functionalities.
- Developed `validate-plex-backups.sh` for validating backup integrity and monitoring.
- Updated `update.sh` to reference the correct path for Plex service management.

crontab/crontab-racknerd.txt

@@ -0,0 +1,12 @@
+# Enhanced Crontab Entries for Racknerd (Backup Server)
+# 
+# These entries include comprehensive logging to syslog with proper tags
+# and error handling for better monitoring and troubleshooting
+
+# Daily Docker backup at midnight (original racknerd job)
+# Enhanced with proper logging and error handling
+0 0 * * * { echo "Starting Docker backup"; /home/acedanger/shell/backup-docker.sh; echo "Docker backup completed with exit code: $?"; } 2>&1 | logger -t docker-backup -p user.info
+
+# Optional: Add a health check entry to monitor backup jobs (every 6 hours)
+# This can help detect if the backup process is failing
+# 0 */6 * * * { echo "Cron health check - Docker backup job scheduled"; ps aux | grep "backup-docker" | grep -v grep | wc -l; } 2>&1 | logger -t cron-health -p user.info