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/logging/mod.rs

@@ -0,0 +1,11 @@
+//! Logging Module - Audit logging and tracing
+//!
+//! Handles audit logging as defined in SPEC.md:
+//! - systemd journal integration (primary)
+//! - Optional remote syslog
+//! - Local file fallback (/var/log/linux_patch_api/audit.log)
+//! - 30-day retention with daily rotation
+
+pub mod appender;
+pub mod journal;
+pub mod init;