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/domain-manager/README.md

@@ -0,0 +1,51 @@
+<div align="center">
+
+# 🌐 Domain Manager
+
+### Unified DNS Management Across All Providers
+
+---
+
+<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
+
+Manage DNS records for Cloudflare, Route53, DigitalOcean, and more from one place.
+
+## Supported Providers
+
+- Cloudflare, AWS Route53, DigitalOcean
+- Google Cloud DNS, Linode
+- Namecheap, GoDaddy
+
+## Record Types
+
+A, AAAA, CNAME, MX, TXT (SPF/DKIM/DMARC), NS, SRV, CAA
+
+## Quick Start
+
+```bash
+# Cloudflare API
+export CF_API_TOKEN="your-token"
+curl -X GET "https://api.cloudflare.com/client/v4/zones" -H "Authorization: Bearer $CF_API_TOKEN"
+```
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">Learn more about GLM 5</a>
+</p>