Add JWT-based security and /me endpoint

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.

docker-compose.yml

@@ -16,12 +16,15 @@ services:
 
   keycloak:
     image: quay.io/keycloak/keycloak:24.0
-    command: ["start-dev","--http-port=8081"]
+    command: ["start-dev","--http-port=8081","--import-realm"]
     environment:
       KEYCLOAK_ADMIN: admin
       KEYCLOAK_ADMIN_PASSWORD: admin
+    volumes:
+      - ./keycloak:/opt/keycloak/data/import
     ports: ["8081:8081"]
 
+
   api:
     build: .
     image: registry.local:5000/hemhub/api:dev