fix(OpenEnv): global overhaul to high-resolution interior clamping (0.001-0.999) per technical diagnosis

fix(OpenEnv): remove bonus task and refine ranges to ensure absolute strictly (0, 1) compliance across all fields

fix(OpenEnv): global overhaul to ensure every sub-score, reward, and model default is strictly within (0.01, 0.99) to satisfy Phase 2 validation

polish: fix leaderboard data, update links, correct app_file paths, fix openenv.yaml

fix: use Docker SDK for Hugging Face Spaces

fix: add Hugging Face space configuration to README

fix: add FastAPI REST endpoints for OpenEnv validator