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/api/mod.rs

@@ -0,0 +1,13 @@
+//! API Module - HTTP endpoints and routing
+//!
+//! Handles all REST API endpoints as defined in API_SPEC.md:
+//! - Package management endpoints
+//! - Patch management endpoints
+//! - System endpoints
+//! - Job management endpoints
+//! - WebSocket streaming
+
+pub mod handlers;
+pub mod middleware;
+pub mod response;
+pub mod routes;