Fix structured logs: use [START]/[STEP]/[END] format with flush=True

Fix checklist: remove HF_TOKEN default, add START/STEP/END structured logs

Move health check to /health to allow Gradio UI at root

Add variability to heuristic agent: randomize column order, fill strategies, text case, and outlier thresholds

Add heuristic fallback agent when API key is missing for validator compatibility

Add server/app.py, uv.lock, openenv-core dependency, and project.scripts entry point

Add pyproject.toml for OpenEnv validation

Add REST API endpoints for OpenEnv validation (POST /reset, /step, /state)

Update author name and add openenv tag for discoverability

Further simplify Dockerfile: remove user creation for HF Spaces

Simplify Dockerfile: remove empty apt-get and healthcheck for HF Spaces

Fix Dockerfile: upgrade pip to prevent build hang on HF Spaces

Add Data Cleaning Agent OpenEnv Environment

initial commit