feat: Enhance BOM management with new header retrieval and version handling

- Added a new endpoint to retrieve BOM headers with entity join support, improving data accessibility.
- Updated the BOM service to include logic for fetching current version IDs and handling version-related data more effectively.
- Enhanced the BOM tree component to utilize the new BOM header API for better data management.
- Implemented version ID fallback mechanisms to ensure accurate data representation during BOM operations.
- Improved the overall user experience by integrating new features for version management and data loading.

backend-node/src/routes/bomRoutes.ts

@@ -10,6 +10,9 @@ const router = Router();
 
 router.use(authenticateToken);
 
+// BOM 헤더 (entity join 포함)
+router.get("/:bomId/header", bomController.getBomHeader);
+
 // 이력
 router.get("/:bomId/history", bomController.getBomHistory);
 router.post("/:bomId/history", bomController.addBomHistory);