docs: add yaml frontmatter to readme

remove .env

fix: use HTTP client with session for state management

fix: use HTTP client instead of async WebSocket

fix: handle async client and None reward values

fix: add main function and uv.lock for openenv validation

fix: correct StepResult import path

feat: create README documentation

feat: create inference.py baseline script

feat: create client.py and __init__.py

feat: create test data CSV files

feat: create openenv.yaml, pyproject.toml, and Dockerfile

feat: create server app.py, __init__.py, requirements.txt

feat: create data_analysis_environment.py with Environment class

feat: create models.py with Action, Observation, State Pydantic models