Fix Docker build: switch to python:3.11-slim base image

Fix Docker build: use python:3.12-slim-bookworm base image

Fix Docker build: use python:3.12-slim base image

Fix structured output for Phase 2 validation

Remove submission steps guide

Fix Hugging Face README frontmatter

Add Hugging Face README metadata

Update README

Merge Hugging Face Space scaffold

Update submission instructions

initial commit

Prepare Velora Env submission