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/config/loader.rs

@@ -0,0 +1,47 @@
+//! Configuration Loader - YAML config loading
+//!
+//! Loads and parses YAML configuration files.
+
+use anyhow::{Context, Result};
+use serde::Deserialize;
+
+/// Server configuration
+#[derive(Debug, Deserialize, Clone)]
+pub struct ServerConfig {
+    pub port: u16,
+    pub bind: String,
+}
+
+/// Jobs configuration
+#[derive(Debug, Deserialize, Clone)]
+pub struct JobsConfig {
+    pub max_concurrent: usize,
+    pub timeout_minutes: u64,
+}
+
+/// Logging configuration
+#[derive(Debug, Deserialize, Clone)]
+pub struct LoggingConfig {
+    pub level: String,
+}
+
+/// Application configuration
+#[derive(Debug, Deserialize, Clone)]
+pub struct AppConfig {
+    pub server: ServerConfig,
+    pub jobs: JobsConfig,
+    pub logging: LoggingConfig,
+}
+
+impl AppConfig {
+    /// Load configuration from a YAML file
+    pub fn load(path: &str) -> Result<Self> {
+        let content = std::fs::read_to_string(path)
+            .with_context(|| format!("Failed to read config file: {}", path))?;
+        
+        let config: AppConfig = serde_yaml::from_str(&content)
+            .with_context(|| format!("Failed to parse config file: {}", path))?;
+        
+        Ok(config)
+    }
+}