- Restructure k8s configs with base/overlays pattern for flexibility
- Add overlays/with-infra for full deployment (PostgreSQL + Redis)
- Add overlays/external for external database scenarios
- Add comprehensive ConfigMap with bootstrap admin settings
- Fix health check path to /actuator/health (auth issue)
- Add SKILLHUB_API_UPSTREAM env for frontend
- Set SESSION_COOKIE_SECURE=false for HTTP environments
- Add Chinese and English documentation in docs/skillhub/
