feat: Add 6 new Claude Code skills

Skills added:
- 🔐 Secret Scanner: Detect leaked credentials in codebases
- 🏛️ Git Archaeologist: Analyze git history, find bugs
- 💾 Backup Automator: Automated encrypted cloud backups
- 🌐 Domain Manager: Unified DNS management
- 🔒 SSL Guardian: Certificate automation and monitoring
- 📡 Log Sentinel: Log analysis and anomaly detection

All skills include:
- SKILL.md with trigger patterns
- README.md with documentation
- GLM 5 attribution and disclaimer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/backup-automator/README.md

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+<div align="center">
+
+# 💾 Backup Automator
+
+### Automated, Encrypted Cloud Backups
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">
+    <img src="https://img.shields.io/badge/Designed%20by-GLM%205%20Advanced%20Coding%20Model-blue?style=for-the-badge" alt="Designed by GLM 5">
+  </a>
+</p>
+
+<p align="center">
+  <i>✨ Autonomously developed by <a href="https://z.ai/subscribe?ic=R0K78RJKNW"><strong>GLM 5 Advanced Coding Model</strong></a></i>
+</p>
+
+<p align="center">
+  <b>⚠️ Disclaimer: Test in a test environment prior to using on any live system</b>
+</p>
+
+</div>
+
+## Overview
+
+Automated, encrypted backups to S3, Backblaze B2, or any storage with retention policies.
+
+## Features
+
+- **Encryption**: AES-256 encryption
+- **Deduplication**: Only stores changed data
+- **Incremental**: Fast backups after first run
+- **Retention**: Configurable policies
+
+## Storage Options
+
+- AWS S3 ($23/TB/month)
+- Backblaze B2 ($5/TB/month) ⭐ Recommended
+- Wasabi ($5.99/TB/month)
+
+## Quick Start
+
+```bash
+# Install restic
+sudo apt install -y restic
+
+# Initialize and backup
+restic init -r b2:bucket:backup
+restic backup -r b2:bucket:backup /home /var/www
+```
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">Learn more about GLM 5</a>
+</p>