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.

configs/config.yaml.example

@@ -0,0 +1,46 @@
+# Linux Patch API Configuration
+# Example configuration file - copy to /etc/linux_patch_api/config.yaml
+
+# Server Configuration
+server:
+  port: 12443
+  bind: "0.0.0.0"
+  timeout_seconds: 30
+
+# TLS/mTLS Configuration
+tls:
+  enabled: true
+  port: 12443
+  ca_cert: "/etc/linux_patch_api/certs/ca.pem"
+  server_cert: "/etc/linux_patch_api/certs/server.pem"
+  server_key: "/etc/linux_patch_api/certs/server.key"
+  min_tls_version: "1.3"
+
+# Job Configuration
+jobs:
+  max_concurrent: 5
+  timeout_minutes: 30
+  storage_path: "/var/lib/linux_patch_api/jobs"
+
+# Logging Configuration
+logging:
+  level: "info"
+  journal_enabled: true
+  syslog_enabled: false
+  # syslog_server: "udp://localhost:514"
+  file_path: "/var/log/linux_patch_api/audit.log"
+  retention_days: 30
+
+# IP Whitelist Configuration
+whitelist:
+  path: "/etc/linux_patch_api/whitelist.yaml"
+  # Entries can be:
+  # - Individual IPs: "192.168.1.100"
+  # - CIDR subnets: "192.168.1.0/24"
+  # - Hostnames: "admin-server.internal"
+
+# Package Manager Backend
+package_manager:
+  # Primary backend (auto-detected if not specified)
+  # Options: apt, dnf, yum, apk, pacman
+  backend: "auto"