fix: preprocess message content by model capability

apps/api/internal/runner/service.go

@@ -531,6 +531,9 @@ func (s *Service) runCandidate(ctx context.Context, task store.GatewayTask, user
 }
 
 func (s *Service) recordTaskParameterPreprocessing(ctx context.Context, taskID string, attemptID string, attemptNo int, candidate store.RuntimeModelCandidate, log parameterPreprocessingLog) error {
+	if skipTaskParameterPreprocessingLog(log.ModelType) {
+		return nil
+	}
 	_, err := s.store.CreateTaskParamPreprocessingLog(ctx, store.CreateTaskParamPreprocessingLogInput{
 		TaskID:          taskID,
 		AttemptID:       attemptID,
@@ -549,6 +552,15 @@ func (s *Service) recordTaskParameterPreprocessing(ctx context.Context, taskID s
 	return err
 }
 
+func skipTaskParameterPreprocessingLog(modelType string) bool {
+	switch strings.TrimSpace(modelType) {
+	case "text_generate", "chat", "responses", "text":
+		return true
+	default:
+		return false
+	}
+}
+
 func (s *Service) clientFor(candidate store.RuntimeModelCandidate, simulated bool) clients.Client {
 	if simulated {
 		return s.clients["simulation"]