feat: Enhance entity options retrieval with additional fields support

- Updated the `getEntityOptions` function to accept an optional `fields` parameter, allowing clients to specify additional columns to be retrieved.
- Implemented logic to dynamically include extra columns in the SQL query based on the provided `fields`, improving flexibility in data retrieval.
- Enhanced the response to indicate whether extra fields were included, facilitating better client-side handling of the data.
- Added logging for authentication failures in the `AuthGuard` component to improve debugging and user experience.
- Integrated auto-fill functionality in the `V2Select` component to automatically populate fields based on selected entity references, enhancing user interaction.
- Updated the `ItemSearchModal` to support multi-selection of items, improving usability in item management scenarios.

frontend/lib/registry/components/v2-select/V2SelectRenderer.tsx

@@ -13,7 +13,7 @@ export class V2SelectRenderer extends AutoRegisteringComponentRenderer {
   static componentDefinition = V2SelectDefinition;
 
   render(): React.ReactElement {
-    const { component, formData, onFormDataChange, isDesignMode, isSelected, isInteractive, ...restProps } = this.props;
+    const { component, formData, onFormDataChange, isDesignMode, isSelected, isInteractive, allComponents, ...restProps } = this.props as any;
 
     // 컴포넌트 설정 추출
     const config = component.componentConfig || component.config || {};
@@ -107,8 +107,7 @@ export class V2SelectRenderer extends AutoRegisteringComponentRenderer {
     // 디버깅 필요시 주석 해제
     // console.log("🔍 [V2SelectRenderer]", { componentId: component.id, effectiveStyle, effectiveSize });
 
-    // 🔧 restProps에서 style, size 제외 (effectiveStyle/effectiveSize가 우선되어야 함)
-    const { style: _style, size: _size, ...restPropsClean } = restProps as any;
+    const { style: _style, size: _size, allComponents: _allComp, ...restPropsClean } = restProps as any;
 
     return (
       <V2Select
@@ -119,9 +118,10 @@ export class V2SelectRenderer extends AutoRegisteringComponentRenderer {
         disabled={config.disabled || component.disabled}
         value={currentValue}
         onChange={handleChange}
+        onFormDataChange={isInteractive ? onFormDataChange : undefined}
+        allComponents={allComponents}
         config={{
           mode: config.mode || "dropdown",
-          // 🔧 카테고리 타입이면 source를 무조건 "category"로 강제 (테이블 타입 관리 설정 우선)
           source: isCategoryType ? "category" : (config.source || "distinct"),
           multiple: config.multiple || false,
           searchable: config.searchable ?? true,
@@ -131,7 +131,6 @@ export class V2SelectRenderer extends AutoRegisteringComponentRenderer {
           entityTable: config.entityTable,
           entityLabelColumn: config.entityLabelColumn,
           entityValueColumn: config.entityValueColumn,
-          // 🔧 카테고리 소스 지원 (tableName, columnName 폴백)
           categoryTable: config.categoryTable || (isCategoryType ? tableName : undefined),
           categoryColumn: config.categoryColumn || (isCategoryType ? columnName : undefined),
         }}