fix(OpenEnv): implement system-wide [0.1, 0.9] boundary scrub for Phase 2 compliance

fix(OpenEnv): fix rounding bug in inference.py log and ensure safe [0.1, 0.9] interior scores

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

fix(OpenEnv): implement robust grader bridge and strict interior clamping [0.1, 0.9] to satisfy Phase 2 validator

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: add FastAPI REST endpoints for OpenEnv validator