[Unit]
Description=StemeDB Backup Timer
Documentation=https://github.com/yourusername/stemedb

[Timer]
# Run every 6 hours (00:00, 06:00, 12:00, 18:00)
OnCalendar=*-*-* 00,06,12,18:00:00
# If system was off, run backup ASAP on next boot
Persistent=true
# Randomize start time by up to 5 minutes to avoid thundering herd
RandomizedDelaySec=5min

[Install]
WantedBy=timers.target