option to bypass scoring

[willccbb]

Description

Adds score_rollouts bool as Environment class attr, with setter functions, to allow skipping scoring.

Environments can optionally reference this attr to skip scoring-only resource initialization in setup_state.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

---

Note

Adds a score_rollouts flag to Environment/EnvGroup to optionally skip scoring by calling Rubric.dummy_score_group instead of score_group.

• Environment:
  • Add score_rollouts attr (default True) with set_score_rollouts; initialize via constructor.
  • In run_group, conditionally call rubric.score_group(...) or rubric.dummy_score_group(...) based on score_rollouts.
• EnvGroup:
  • Add set_score_rollouts to propagate the flag to all sub-environments.
• Rubric:
  • Implement dummy_score_group to set zero reward and empty metrics for rollouts.

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