feat: Implement orphan record deletion logic based on edit mode

- Updated the DataService to conditionally delete orphan records only when in EDIT mode, controlled by the deleteOrphans flag.
- Enhanced the SelectedItemsDetailInputComponent to determine the mode (EDIT or CREATE) based on the presence of existing database IDs, ensuring that orphan records are only deleted when necessary.
- Improved data integrity by preventing unintended deletions during the CREATE process.

backend-node/src/services/dataService.ts

@@ -1505,14 +1505,17 @@ class DataService {
         }
       }
 
-      // 3. 고아 레코드 삭제: 기존 레코드 중 이번에 처리되지 않은 것 삭제
-      for (const existingRow of existingRecords.rows) {
-        const existId = existingRow[pkColumn];
-        if (!processedIds.has(existId)) {
-          const deleteQuery = `DELETE FROM "${tableName}" WHERE "${pkColumn}" = $1`;
-          await pool.query(deleteQuery, [existId]);
-          deleted++;
-          console.log(`🗑️ DELETE orphan: ${pkColumn} = ${existId}`);
+      // 3. 고아 레코드 삭제: deleteOrphans=true일 때만 (EDIT 모드)
+      // CREATE 모드에서는 기존 레코드를 건드리지 않음
+      if (deleteOrphans) {
+        for (const existingRow of existingRecords.rows) {
+          const existId = existingRow[pkColumn];
+          if (!processedIds.has(existId)) {
+            const deleteQuery = `DELETE FROM "${tableName}" WHERE "${pkColumn}" = $1`;
+            await pool.query(deleteQuery, [existId]);
+            deleted++;
+            console.log(`🗑️ DELETE orphan: ${pkColumn} = ${existId}`);
+          }
         }
       }