Phase 0: Rust project scaffolding (M0 complete)

Completed Rust project initialization:
- Cargo.toml with all dependencies (actix-web, tokio, rustls, etc.)
- Project structure (src/, tests/, configs/)
- Module declarations (api, auth, config, jobs, logging, packages, systemd)
- Clippy and rustfmt configured
- Initial lib.rs and main.rs with logging setup
- Config examples (config.yaml.example, whitelist.yaml.example)

Dependencies resolved and project compiles successfully.
Rust toolchain 1.94.1 installed.

src/lib.rs

@@ -0,0 +1,26 @@
+//! Linux Patch API - Secure Remote Package Management
+//!
+//! A Rust-based API service for secure remote management of patching processes
+//! and software add/remove operations on Linux systems.
+//!
+//! # Architecture
+//!
+//! - **API Layer**: HTTP/HTTPS endpoints with mTLS authentication
+//! - **Auth Layer**: Certificate validation and IP whitelist enforcement
+//! - **Job Manager**: Async job queue with WebSocket status streaming
+//! - **Package Backend**: Pluggable package manager adapters
+//! - **Audit Logger**: systemd journal + file fallback
+//! - **Config Manager**: YAML config with auto-reload
+
+pub mod api;
+pub mod auth;
+pub mod config;
+pub mod jobs;
+pub mod logging;
+pub mod packages;
+pub mod systemd;
+
+// Re-export commonly used types
+pub use config::AppConfig;
+pub use jobs::JobManager;
+pub use logging::init_logging;