bug: silent failure when grader fails

[christso]

I ran

agentv eval evals/cargowise/cw-refvessel.eval.yaml --test-id rule1-antipattern-firstordefault

The score was 1, and no error or warning was reported.

If I view the results.jsonl, I see this excerpt:

test_id: rule1-antipattern-firstordefault
eval_set: cw-refvessel.eval
score: 1
assertions:
  - text: "Grader parse failure after 3 attempts: Failed to parse evaluator response after 3 attempts: Resource not found"
    passed: false
  - text: 'Skill tool invoked via tool name "Using skill: cw-refvessel"'
    passed: true