Module backup 

Backup and restore functionality for CHIE storage.

This module provides:

• Full backup creation
• Incremental backup support
• Backup restoration with integrity verification
• Progress tracking for long operations

Structs

BackupConfig

Backup configuration.

BackupContentEntry

Entry for each content item in the backup.

BackupManager

Backup manager for creating and restoring backups.

BackupManifest

Backup manifest describing the backup contents.

BackupProgress

Progress tracking for backup/restore operations.

BackupResult

Result of a backup operation.

RestoreResult

Result of a restore operation.

RetentionPolicy

Retention policy for managing backup history.

Enums

BackupError

Backup-related errors.

BackupType

Type of backup.

Functions

apply_retention_policy

Apply retention policy to backup directory.