3-level

3-level curriculum + 7B + reward fixes

changed model

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modified

implemented

Fix 8 compliance gaps: repeat-action dedup+cache, min-steps hard block, criminal history tool (12th action), efficiency removed from training formula, circular import cleaned, yaml formula synced

Fix B1-B4: add 4 actions to openenv.yaml, export from __init__/client, fix reward range, remove global random.seed

Fix model mismatch: openenv.yaml now correctly declares Qwen2.5-7B-Instruct

OpenEnv compliance: proper base class, SUPPORTS_CONCURRENT_SESSIONS, state @property, updated openenv.yaml

first commit