Module backup 

P2: Backup & Restore System

Provides production-grade backup and restore capabilities:

• Incremental backups using RocksDB checkpoints
• Point-in-time recovery (PITR)
• Export to JSON/Parquet formats
• Backup verification and integrity checks
• Automated scheduling support

Structs

BackupMetadata

Backup metadata for tracking and verification

SecondaryStoreRef

Named reference to a RocksDB database for backup

ShodhBackupEngine

Backup engine for creating and managing backups

Enums

BackupType

Functions

copy_dir_recursive_pub

Public wrapper for copy_dir_recursive (used by restore handler).