#!/usr/bin/env php
Usage: php cleanup-old-firmware.php [options]
Options:
  --stage STAGE      Stage to clean (dev, staging, prod)
  --device DEVICE    Device to clean (rm-e32-r6-b6, esp32-s3-poe-eth-8di-8ro-c)
  --keep N           Number of versions to keep (default: 5)
  --dry-run          Show what would be deleted without deleting
  --all-stages       Clean all stages for specified device
  --all-devices      Clean all devices for specified stage
  --help             Show this help message

Examples:
  php cleanup-old-firmware.php --stage dev --device rm-e32-r6-b6 --keep 3
  php cleanup-old-firmware.php --all-stages --device rm-e32-r6-b6 --dry-run
  php cleanup-old-firmware.php --stage prod --all-devices --keep 10