test: add tests for FastAPI server wrapper behavior

feat: implement episode finalization and adjust session support flag

docs: capture todo - Improve OpenEnv SearchEnvironment design

docs: map existing codebase

docs: capture todo - Fix SearchEnvironment episode lifecycle

fix: ensure scores are strictly between 0 and 1

feat: run multiple tasks for submission grading

fix: simplify Dockerfile for HuggingFace Spaces

fix: run environment in-process by default

fix: default ENV_BASE_URL to localhost:8000 for Docker container

fix: add local in-process environment fallback

fix: default ENV_BASE_URL to HuggingFace space

fix: properly handle task_id in reset endpoint

fix: add root endpoint and API documentation

refactor: unify data format and add stateful HTTP server

chore: update lockfile

chore: add datagen optional dependencies

docs: add datagen env vars to env.example

docs: update data module docstring

feat: add data generation pipeline

feat: add base explorer agent

feat: add core utils for data generation

feat: add data generator module

docs: rewrite README for clarity

chore: update pyproject.toml package config

refactor: simplify models.py to re-export from searcharena

refactor: simplify client.py to re-export from searcharena

refactor: update root __init__ to re-export from searcharena

fix: load env vars at module level for API proxy

fix: update edge case tests imports

fix: update tasks tests for data module

fix: update rewards tests imports

fix: update retrieval tests imports

fix: update environment tests for searcharena imports

fix: update test fixtures for new imports

remove: delete server/requirements.txt (using uv)

remove: delete server/tasks/ (moved to data/)

remove: delete old server/retrieval.py and rewards.py

fix: update app imports for new package structure

refactor: update server to use searcharena package

feat: add training utilities module

feat: add data module for documents and tasks

feat: add searcharena core package

refactor: update environment variable handling and improve logging function signatures

refactor: update type hints to use built-in generic types and improve logging function signatures

refactor: update type hints to use built-in generic types

Refactor inference and logging mechanisms; remove log_utils.py

feat: add initial environment configuration file

refactor: update environment variables and reward validation range

updated readme and project.toml