//! # Cluster Lifecycle Tests
//!
//! This module verifies the complete lifecycle of d-engine clusters,
//! from single-node bootstrap to multi-node cluster formation and scaling.
//!
//! ## Business Scenarios Covered
//!
//! 1. **Single-Node Bootstrap (Embedded)**: Verify a standalone node can self-elect as leader
//! and accept KV operations immediately after startup
//! 2. **Multi-Node Cluster Formation (Embedded)**: Form a 3-node cluster with automatic
//! leader election among nodes
//! 3. **Multi-Node Cluster Formation (Standalone)**: Same via gRPC for remote nodes
//! 4. **Cluster Scaling (1→3 nodes)**: Seamlessly transition from single-node to 3-node cluster
//! without data loss or downtime
//! 5. **Configuration Loading**: Parse and apply cluster configuration from TOML files,
//! supporting both single-node and multi-node modes
//!
//! ## Test Files
//!
//! - `single_node_bootstrap_embedded.rs` - Single-node lifecycle and self-election
//! - `cluster_bootstrap_embedded.rs` - Multi-node cluster bootstrap (embedded) - ❌ MISSING
//! - `cluster_bootstrap_standalone.rs` - Multi-node cluster bootstrap (standalone/gRPC) - ❌ MISSING
//! - `scale_single_to_three_node_embedded.rs` - Scaling without data loss
//! - `config_loading_embedded.rs` - Configuration file parsing and validation
//!
// mod cluster_bootstrap_embedded;
// mod cluster_bootstrap_standalone;