Build a command-line tool /app/backup.py that performs checksum-verified backup and restore of files.

Build a command-line tool /app/backup.py that performs checksum-verified backup and restore of files.: a task in TermGrade Environments: 1,004 executable Linux tasks (Harbor dataset). Commands: - python /app/backup.py backup <source dir <dest dir — recursively backs up all regular files from…

The task

**Commands:** - `python /app/backup.py backup <source_dir> <dest_dir>` — recursively backs up all regular files from source_dir into dest_dir. - `python /app/backup.py restore <source_dir> <dest_dir>` — restores files from dest_dir back to source_dir, verifying checksums.

Part of ai-and/termgrade-environments.