feat: Add PK and index management APIs for table management

- Implemented new API endpoints for managing primary keys and indexes in the table management system.
- Added functionality to retrieve table constraints, set primary keys, toggle indexes, and manage NOT NULL constraints.
- Enhanced the frontend to support PK and index management, including loading constraints and handling user interactions for toggling indexes and setting primary keys.
- Improved error handling and logging for better debugging and user feedback during these operations.

backend-node/src/routes/tableManagementRoutes.ts

@@ -28,6 +28,10 @@ import {
   multiTableSave, // 🆕 범용 다중 테이블 저장
   getTableEntityRelations, // 🆕 두 테이블 간 엔티티 관계 조회
   getReferencedByTables, // 🆕 현재 테이블을 참조하는 테이블 조회
+  getTableConstraints, // 🆕 PK/인덱스 상태 조회
+  setTablePrimaryKey, // 🆕 PK 설정
+  toggleTableIndex, // 🆕 인덱스 토글
+  toggleColumnNullable, // 🆕 NOT NULL 토글
 } from "../controllers/tableManagementController";
 
 const router = express.Router();
@@ -133,6 +137,30 @@ router.put("/tables/:tableName/columns/batch", updateAllColumnSettings);
  */
 router.get("/tables/:tableName/schema", getTableSchema);
 
+/**
+ * PK/인덱스 제약조건 상태 조회
+ * GET /api/table-management/tables/:tableName/constraints
+ */
+router.get("/tables/:tableName/constraints", getTableConstraints);
+
+/**
+ * PK 설정 (기존 PK DROP 후 재생성)
+ * PUT /api/table-management/tables/:tableName/primary-key
+ */
+router.put("/tables/:tableName/primary-key", setTablePrimaryKey);
+
+/**
+ * 인덱스 토글 (생성/삭제)
+ * POST /api/table-management/tables/:tableName/indexes
+ */
+router.post("/tables/:tableName/indexes", toggleTableIndex);
+
+/**
+ * NOT NULL 토글
+ * PUT /api/table-management/tables/:tableName/columns/:columnName/nullable
+ */
+router.put("/tables/:tableName/columns/:columnName/nullable", toggleColumnNullable);
+
 /**
  * 테이블 존재 여부 확인
  * GET /api/table-management/tables/:tableName/exists