Integrate OIDC-based SSO authentication through Casdoor using
django-allauth. Adds configuration for enabling SSO, custom account
adapters, and an optional SSL verification bypass for sandbox
environments with self-signed certificates.
- Add CASDOOR_* and ALLOW_LOCAL_LOGIN env vars to .env.example and
docker-compose (app service only)
- Configure allauth with openid_connect provider for Casdoor
- Register custom adapters (CasdoorAccountAdapter, LocalAccountAdapter)
- Apply SSL patch early in settings when CASDOOR_SSL_VERIFY=false
