Add 5 detailed deployment guides to docs/deployment-guides/
- 01-turn-server-setup.md: TURN Server architecture, deployment, verification
- 02-authentik-identity-provider.md: Two-stage OIDC integration (Stage 1 & Stage 2)
- 03-monitoring-integration.md: Alloy, Prometheus, Loki integration with Selendis
- 04-element-customization.md: Custom themes (7), desktop setup scripts, admin panel
- 05-room-policies.md: Message retention, room publication, auto-join policies
All guides include troubleshooting, configuration examples, and best practices.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>