#!/usr/bin/env php
Usage: php rollback-firmware.php [options]
Options:
  --stage STAGE      Stage to rollback (dev, staging, prod)
  --device DEVICE    Device to rollback (rm-e32-r6-b6, esp32-s3-poe-eth-8di-8ro-c)
  --steps N          Number of versions to rollback (default: 1)
  --dry-run          Show what would be rolled back without changes
  --all-stages       Rollback all stages for specified device
  --all-devices      Rollback all devices for specified stage
  --help             Show this help message

Examples:
  php rollback-firmware.php --stage prod --device rm-e32-r6-b6 --steps 1
  php rollback-firmware.php --all-stages --device rm-e32-r6-b6 --dry-run
  php rollback-firmware.php --stage prod --all-devices --steps 2

WARNING: This operation removes firmware files. Use --dry-run first!