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/packages/mod.rs

@@ -0,0 +1,11 @@
+//! Packages Module - Pluggable package manager backend
+//!
+//! Handles package operations as defined in SPEC.md:
+//! - apt/dpkg (Debian/Ubuntu) - primary
+//! - dnf/yum (RHEL/CentOS/Fedora) - secondary
+//! - apk (Alpine) - secondary
+//! - pacman (Arch) - secondary
+
+pub mod backend;
+pub mod manager;
+pub mod models;