Fix: Cron Jobs Causing Server Load Spikes

When multiple jobs run at the same minute — especially midnight — they compete for CPU, disk I/O, and database connections simultaneously, causing load spikes that affect live traffic.

# Before — all at midnight:
0 0 * * * /usr/local/bin/backup.sh
0 0 * * * /usr/local/bin/cleanup.sh
0 0 * * * /usr/local/bin/report.sh

# After — staggered:
0  0 * * * /usr/local/bin/backup.sh
10 0 * * * /usr/local/bin/cleanup.sh
25 0 * * * /usr/local/bin/report.sh

Add random jitter for fleets

# Add 0–10 minute random delay:
0 2 * * * sleep $((RANDOM % 600)) && /usr/local/bin/backup.sh