fix: rename roles to use underscores instead of hyphens which was causing the roles not to be found

roles/system_maintenance/README.md

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+# System Maintenance Role
+
+Updates packages and handles system maintenance tasks across multiple distributions.
+
+## Features
+
+- Multi-distribution support (Debian/Ubuntu/Alpine)
+- Package cache updates and upgrades
+- Automatic cleanup of unused packages
+- Reboot handling when required
+- Distribution detection and validation
+
+## Supported Distributions
+
+- **Debian/Ubuntu** - Updates via apt, removes unused packages, checks for reboot requirements
+- **Alpine** - Updates via apk package manager
+
+## Usage
+
+```yaml
+- name: Perform system maintenance
+  include_role:
+    name: system_maintenance
+```
+
+## What It Does
+
+### Debian/Ubuntu Systems
+1. Updates package cache (6-hour validity)
+2. Upgrades all packages
+3. Removes unused packages and purges configs
+4. Checks if reboot is required
+5. Triggers reboot handler if needed
+
+### Alpine Systems
+1. Updates package cache
+2. Upgrades all packages
+
+## Requirements
+
+- Root privileges
+- Supported distribution (Debian/Ubuntu/Alpine)
+
+## Notes
+
+- Role automatically detects distribution and uses appropriate tasks
+- Fails gracefully on unsupported distributions
+- Reboot is handled via handler (only when required on Debian/Ubuntu)