Add explicit assertions for held-out scores and gate actions to the verifier discipline test suite to strengthen its guarantees.
- Assert the concrete held-out baseline and candidate scores in test_gate_rejects_reward_hacking_edit.
- Add test_gate_accepts_beneficial_edit using MockBeneficialBackend to provide a paired case where an edit genuinely improves the held-out slice, expecting accepted=True and gate_action='accept_new_best'.
Tanmay Garg
cd8034c2db