Updated Keycloak settings in `realm-hemhub.json` to include additional roles, user attributes, client scopes, and OpenID Connect configurations. Modified `application.yml` to replace `issuer-uri` with `jwk-set-uri` for JWT handling. Enhanced `docker-compose.yml` to include persistent volumes, updated Keycloak image, and environment variables for better container interoperability.
Introduced JWT-based authentication with role handling using Keycloak. Added the `/me` endpoint to return user information and roles. Configured testing, Keycloak integration, and public-facing `/public/info` endpoint enhancements.
