refactor: rename HOST_* env vars to SLHAF_HUB_* across CLI/TUI, security, docs, and compose

docker-compose.yml

@@ -10,9 +10,9 @@ services:
     container_name: slhaf-hub
     restart: unless-stopped
     ports:
-      - "${HOST_PORT:-8080}:8080"
+      - "${SLHAF_HUB_PORT:-8080}:8080"
     environment:
-      HOST_API_TOKEN: ${HOST_API_TOKEN:-}
+      SLHAF_HUB_TOKEN: ${SLHAF_HUB_TOKEN:-}
       MAX_RUN_CONCURRENCY: ${MAX_RUN_CONCURRENCY:-}
     volumes:
       - ./scripts:/app/scripts