Split param processor and tighten Volces frame validation

apps/api/internal/runner/service.go

@@ -104,6 +104,17 @@ func (s *Service) execute(ctx context.Context, task store.GatewayTask, user *aut
 		firstCandidateBody = preprocessing.Body
 		firstPreprocessing = preprocessing.Log
 		normalizedModelType = candidates[0].ModelType
+		if preprocessing.Err != nil {
+			clientErr := parameterPreprocessClientError(preprocessing.Err)
+			if logErr := s.recordTaskParameterPreprocessing(ctx, task.ID, "", 0, candidates[0], firstPreprocessing); logErr != nil {
+				return Result{}, logErr
+			}
+			failed, finishErr := s.failTask(ctx, task.ID, clients.ErrorCode(clientErr), clientErr.Error(), task.RunMode == "simulation", clientErr, parameterPreprocessingMetrics(firstPreprocessing))
+			if finishErr != nil {
+				return Result{}, finishErr
+			}
+			return Result{Task: failed, Output: failed.Result}, clientErr
+		}
 		if err := s.store.MarkTaskRunning(ctx, task.ID, candidates[0].ModelType, firstCandidateBody); err != nil {
 			return Result{}, err
 		}
@@ -149,6 +160,10 @@ candidatesLoop:
 			preprocessing := preprocessRequestWithLog(task.Kind, body, candidate)
 			preprocessingLog := preprocessing.Log
 			lastPreprocessing = &preprocessingLog
+			if preprocessing.Err != nil {
+				lastErr = parameterPreprocessClientError(preprocessing.Err)
+				break candidatesLoop
+			}
 			candidateBody := preprocessing.Body
 			response, err := s.runCandidate(ctx, task, user, candidateBody, preprocessing.Log, candidate, nextAttemptNo, onDelta)
 			if err == nil {
@@ -868,3 +883,15 @@ func validateRequest(kind string, body map[string]any) error {
 	}
 	return nil
 }
+
+func parameterPreprocessClientError(err error) *clients.ClientError {
+	if err == nil {
+		return nil
+	}
+	return &clients.ClientError{
+		Code:       "invalid_parameter",
+		Message:    err.Error(),
+		StatusCode: 400,
+		Retryable:  false,
+	}
+}