Refactor grader to use openenv.core.rubrics.WeightedSum + Rubric subclasses

Acknowledge OpenEnv Rubric system conformance gap

Algorithm Distillation: grader v2 with belief_accuracy + SFT pipeline

iter4: fix the 'constant belief = free reward' bug + 6 other deep issues

iter3: align reward with grader + belief-first format + exploration shaping

iter2: fix mode collapse + 3 deeper bugs from code review

env: meta-RL refactor (continuous profiles, action+belief, adaptation grader)

env: enrich observation with history, anomalies, and discovery bonus

Rebuild as Life Simulator: 5 meters, 3 hidden profiles, GRPO training pipeline

Fix bugs, add tests, and improve code quality

Add custom task input support and update URLs to HF Space

Initial commit: RhythmEnv daily planning RL environment