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: increase score precision to 4 decimal places in inference.py to resolve validation out-of-range errors

fix(OpenEnv): restore missing math import in grader.py to fix unhandled exception in Phase 2

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

fix(grader): clamp all scores to [0.01,0.99] and revert inference to :.2f format

fix(grader): clamp all scores to strictly (0.0001, 0.9999) per Phase 2 validator requirement

fix: add FastAPI REST endpoints for OpenEnv validator