fix(eval): repair eval-conflicts CLI and expand dataset to 100 pairs (#377)

The eval-conflicts CLI never worked end-to-end because all three HTTP
response decoders (auth token, validator eval, scorer eval) failed to
unwrap the server's {"data":...} envelope. Fix all three.

Expand the validator eval dataset from 63 to 100 labeled pairs by
adding 37 production-labeled conflicts (17 genuine, 16
related_not_contradicting, 4 unrelated_false_positive) from a
judge + meta-judge audit of real conflict data.

Baseline metrics on the expanded dataset:
- Scorer precision: 45.9% (embedding-only, no threshold separates classes)
- Validator (gpt-4o-mini) precision: 91.5%, recall: 95.6%, F1: 93.5%
- Relationship accuracy: 77.4% (5-class exact match)

Refs: #376

Author: evanvolgas

cmd/eval-conflicts/main.go

@@ -186,12 +186,17 @@ func authenticate(baseURL, agentID, apiKey string) (string, error) {
 	}
 
 	var result struct {
-		Token string `json:"token"`
+		Data struct {
+			Token string `json:"token"`
+		} `json:"data"`
 	}
 	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
 		return "", fmt.Errorf("decode: %w", err)
 	}
-	return result.Token, nil
+	if result.Data.Token == "" {
+		return "", fmt.Errorf("empty token in response")
+	}
+	return result.Data.Token, nil
 }
 
 type validatorEvalResponse struct {
@@ -223,11 +228,13 @@ func callValidatorEval(baseURL, token string) (conflicts.EvalMetrics, []conflict
 		return conflicts.EvalMetrics{}, nil, fmt.Errorf("status %d: %s", resp.StatusCode, string(respBody))
 	}
 
-	var result validatorEvalResponse
-	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+	var envelope struct {
+		Data validatorEvalResponse `json:"data"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&envelope); err != nil {
 		return conflicts.EvalMetrics{}, nil, fmt.Errorf("decode: %w", err)
 	}
-	return result.Metrics, result.Results, nil
+	return envelope.Data.Metrics, envelope.Data.Results, nil
 }
 
 func callScorerEval(baseURL, token string) (scorerEvalResult, error) {
@@ -254,9 +261,11 @@ func callScorerEval(baseURL, token string) (scorerEvalResult, error) {
 		return scorerEvalResult{}, fmt.Errorf("status %d: %s", resp.StatusCode, string(respBody))
 	}
 
-	var result scorerEvalResult
-	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+	var envelope struct {
+		Data scorerEvalResult `json:"data"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&envelope); err != nil {
 		return scorerEvalResult{}, fmt.Errorf("decode: %w", err)
 	}
-	return result, nil
+	return envelope.Data, nil
 }