//! Intel SGX enclave integration
//!
//! **Status**: Not yet implemented
//!
//! # Planned Features
//!
//! - Enclave-based key operations
//! - Remote attestation with Intel Attestation Service
//! - Sealed storage for persistent keys
//! - Quote generation and verification
//!
//! # Implementation Plan
//!
//! - [ ] Choose SGX SDK (Gramine, Fortanix, or bare SDK)
//! - [ ] Implement enclave code for key operations
//! - [ ] Implement `SgxProvider` struct
//! - [ ] Implement `SecureKeyProvider` trait for SGX
//! - [ ] Add remote attestation support
//! - [ ] Add tests with SGX simulator
// TODO: Implementation requires SGX-enabled hardware or simulator
// Consider Gramine or Fortanix Rust EDP for easier development