docs: add comprehensive tutorials for real-world usage (Phase 3) (#254)

- Added production database management tutorial with:
  - Environment setup and profiles
  - Monitoring and health checks
  - Scaling operations
  - Backup and recovery procedures
  - Security best practices

- Added monitoring setup tutorial covering:
  - Health check scripts
  - Prometheus integration with custom exporter
  - Grafana dashboards
  - ELK stack integration
  - Alerting with Slack/PagerDuty

- Added CI/CD integration tutorial including:
  - GitHub Actions workflows
  - GitLab CI/CD pipelines
  - Jenkins integration
  - ArgoCD GitOps
  - Terraform management
  - Blue-green deployments

- Added skeleton files for disaster recovery and network security tutorials

Part of #246

Author: joshrotenberg