feat(engineering-team): add azure-cloud-architect, security-pen-testing; extend terraform-patterns

azure-cloud-architect (451-line SKILL.md, 3 scripts, 3 references):
- 6-step workflow mirroring aws-solution-architect for Azure
- Bicep/ARM templates, AKS, Functions, Cosmos DB, cost optimization
- architecture_designer.py, cost_optimizer.py, bicep_generator.py

security-pen-testing (850-line SKILL.md, 3 scripts, 3 references):
- OWASP Top 10 systematic audit, offensive security testing
- XSS/SQLi/SSRF/IDOR detection, secret scanning, API security
- vulnerability_scanner.py, dependency_auditor.py, pentest_report_generator.py
- Responsible disclosure workflow included

terraform-patterns extended (487 → 740 lines):
- Multi-cloud provider configuration
- OpenTofu compatibility notes
- Infracost integration for PR cost estimation
- Import existing infrastructure patterns
- Terragrunt DRY multi-environment patterns

Updated engineering-team plugin.json (26 → 28 skills).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mkdocs.yml

@@ -122,6 +122,7 @@ nav:
       - Overview: skills/engineering-team/index.md
       - "A11y Audit": skills/engineering-team/a11y-audit.md
       - "AWS Solution Architect": skills/engineering-team/aws-solution-architect.md
+      - "Azure Cloud Architect": skills/engineering-team/azure-cloud-architect.md
       - "Code Reviewer": skills/engineering-team/code-reviewer.md
       - "Email Template Builder": skills/engineering-team/email-template-builder.md
       - "Incident Commander": skills/engineering-team/incident-commander.md
@@ -158,6 +159,7 @@ nav:
       - "Senior QA Engineer": skills/engineering-team/senior-qa.md
       - "Senior SecOps Engineer": skills/engineering-team/senior-secops.md
       - "Senior Security Engineer": skills/engineering-team/senior-security.md
+      - "Security Pen Testing": skills/engineering-team/security-pen-testing.md
       - "Stripe Integration Expert": skills/engineering-team/stripe-integration-expert.md
       - "TDD Guide": skills/engineering-team/tdd-guide.md
       - "Tech Stack Evaluator": skills/engineering-team/tech-stack-evaluator.md