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/SKILL.md

@@ -0,0 +1,37 @@
+---
+name: domain-manager
+description: Use this skill when the user asks to "manage DNS", "configure domain", "DNS records", "add subdomain", "update DNS", "domain setup", "cloudflare DNS", "route53", or mentions managing domains and DNS.
+version: 1.0.0
+---
+
+# Domain Manager Skill
+
+Unified DNS management across multiple providers - Cloudflare, Route53, DigitalOcean, and more.
+
+## Supported Providers
+
+- Cloudflare (CDN/DNS)
+- AWS Route53
+- DigitalOcean DNS
+- Google Cloud DNS
+- Namecheap, GoDaddy, Linode
+
+## Quick Commands
+
+```bash
+# Cloudflare - Add A record
+curl -X POST "https://api.cloudflare.com/client/v4/zones/{zone_id}/dns_records" \
+     -H "Authorization: Bearer {token}" \
+     -d '{"type":"A","name":"www","content":"192.168.1.1"}'
+
+# Check propagation
+dig example.com +short
+```
+
+## Usage
+
+```
+"Add A record for blog.domain.com pointing to 1.2.3.4"
+"Setup SPF and DKIM records for my domain"
+"List all DNS records for domain.com"
+```