fix(openai): selector 분류 오류 근거를 보존한다

apps/edge/internal/openai/hot_path_dispatch.go

@@ -1195,6 +1195,13 @@ func (s *Server) dispatchPresetTurn(
 	}
 	decision, err := classifyHotPathOutput(preset, issued, output, gate)
 	if err != nil {
+		if initialAdmission {
+			names := make([]string, 0, len(output.ToolCalls))
+			for _, call := range output.ToolCalls {
+				names = append(names, call.Name)
+			}
+			err = fmt.Errorf("%w; selector returned %d tool calls %q", err, len(output.ToolCalls), names)
+		}
 		if initialAdmission {
 			s.emitHotPathDispatchRejection(r.Context(), hotPathNormalizeMode(string(decision.Mode)), decision.Reason, requestID, stageID, preset.ID)
 		}