Reward-hardened graders

Trace-detective lab: a broken patch with an injected score comment outranks a working fix (100 vs 75) under a vulnerable rubric grader, and a tampered workspace test file still scores 50 under unverified grounding. Trace three candidate patches across three graders and see how test-integrity checking plus score grounding zeroes both gamed patches while keeping the honest fix at 75.

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