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/git-archaeologist/README.md

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+<div align="center">
+
+# 🏛️ Git Archaeologist
+
+### Dig Through Code History to Find Bugs and Answers
+
+---
+
+<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
+
+Analyze Git history to understand code evolution, find bugs, and track changes.
+
+## Features
+
+- **Bug Bisect**: Binary search through commits to find when bug appeared
+- **Blame Analysis**: Line-by-line authorship
+- **Hotspot Detection**: Frequently changed files
+- **Author Stats**: Contribution metrics
+
+## Quick Start
+
+```bash
+# Find bad commit with bisect
+git bisect start
+git bisect bad
+git bisect good v1.0.0
+
+# File history
+git log --oneline --follow filename.py
+
+# Hotspots
+git log --name-only --pretty=format: | sort | uniq -c | sort -nr | head -20
+```
+
+---
+
+<p align="center">
+  <a href="https://z.ai/subscribe?ic=R0K78RJKNW">Learn more about GLM 5</a>
+</p>

skills/git-archaeologist/SKILL.md

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+---
+name: git-archaeologist
+description: Use this skill when the user asks to "analyze git history", "find when bug was introduced", "git blame analysis", "code history", "who wrote this code", "when was this changed", "git bisect", or mentions investigating code history.
+version: 1.0.0
+---
+
+# Git Archaeologist Skill
+
+Analyzes Git repository history to understand code evolution, find when bugs were introduced, and identify problematic commits.
+
+## What It Does
+
+1. **Bug Origin Finding**: Identify when and how a bug was introduced
+2. **Code Evolution Analysis**: Understand how code changed over time
+3. **Author Attribution**: Who wrote/modified specific code
+4. **Hotspot Detection**: Files that change frequently
+
+## Quick Commands
+
+```bash
+# Git bisect to find bad commit
+git bisect start
+git bisect bad
+git bisect good v1.0.0
+
+# File history
+git log --oneline --follow filename.py
+
+# Who changed file most
+git log --format="%an" --follow -- filename.py | sort | uniq -c | sort -nr
+```
+
+## Usage
+
+```
+"Find when this bug was introduced"
+"Who wrote the authentication module?"
+"Show me commits that touched this function"
+```