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/systemd/mod.rs

@@ -0,0 +1,11 @@
+//! Systemd Module - Systemd service integration
+//!
+//! Handles systemd integration as defined in ARCHITECTURE.md:
+//! - Service notification (Type=notify)
+//! - Journal logging integration
+//! - PID file management
+//! - Graceful shutdown handling
+
+pub mod service;
+pub mod journal;
+pub mod pid;