Module encryption 

Encryption utilities for local data protection

Provides AES-256-GCM encryption for protecting sensitive configuration and user data at rest.

Security Notes

• Uses AES-256-GCM for authenticated encryption
• Nonces are randomly generated and prepended to ciphertext
• Keys should be stored securely (e.g., in OS keychain)

Structs

Encryptor

AES-256-GCM encryptor for protecting sensitive data

SecureConfigManager

Secure configuration manager with encryption and keychain-backed key storage