feat: Phase 3.15 배치 서비스 Raw Query 전환 완료

4개 서비스 24개 Prisma 호출 전환 완료

배치 서비스 전환:
- BatchExternalDbService (8개)
- BatchExecutionLogService (7개)
- BatchManagementService (5개)
- BatchSchedulerService (4개)

주요 기술:
- json_agg + json_build_object
- 동적 WHERE 절
- 동적 UPDATE 쿼리
- PostgreSQL placeholders

Phase 3 완료
문서: PHASE3.15_BATCH_SERVICES_MIGRATION.md

backend-node/src/services/batchSchedulerService.ts

@@ -2,7 +2,7 @@
 // 작성일: 2024-12-24
 
 import * as cron from 'node-cron';
-import prisma from '../config/database';
+import { query, queryOne } from '../database/db';
 import { BatchService } from './batchService';
 import { BatchExecutionLogService } from './batchExecutionLogService';
 import { logger } from '../utils/logger';
@@ -59,14 +59,28 @@ export class BatchSchedulerService {
    */
   private static async loadActiveBatchConfigs() {
     try {
-      const activeConfigs = await prisma.batch_configs.findMany({
-        where: {
-          is_active: 'Y'
-        },
-        include: {
-          batch_mappings: true
-        }
-      });
+      const activeConfigs = await query<any>(
+        `SELECT 
+          bc.*,
+          json_agg(
+            json_build_object(
+              'id', bm.id,
+              'batch_config_id', bm.batch_config_id,
+              'field_name', bm.field_name,
+              'source_field', bm.source_field,
+              'field_type', bm.field_type,
+              'is_required', bm.is_required,
+              'default_value', bm.default_value,
+              'transform_function', bm.transform_function,
+              'sort_order', bm.sort_order
+            )
+          ) FILTER (WHERE bm.id IS NOT NULL) as batch_mappings
+        FROM batch_configs bc
+        LEFT JOIN batch_mappings bm ON bc.id = bm.batch_config_id
+        WHERE bc.is_active = 'Y'
+        GROUP BY bc.id`,
+        []
+      );
 
       logger.info(`활성화된 배치 설정 ${activeConfigs.length}개 발견`);
 
@@ -153,10 +167,30 @@ export class BatchSchedulerService {
       await this.unscheduleBatchConfig(configId);
 
       // 업데이트된 배치 설정 조회
-      const config = await prisma.batch_configs.findUnique({
-        where: { id: configId },
-        include: { batch_mappings: true }
-      });
+      const configResult = await query<any>(
+        `SELECT 
+          bc.*,
+          json_agg(
+            json_build_object(
+              'id', bm.id,
+              'batch_config_id', bm.batch_config_id,
+              'field_name', bm.field_name,
+              'source_field', bm.source_field,
+              'field_type', bm.field_type,
+              'is_required', bm.is_required,
+              'default_value', bm.default_value,
+              'transform_function', bm.transform_function,
+              'sort_order', bm.sort_order
+            )
+          ) FILTER (WHERE bm.id IS NOT NULL) as batch_mappings
+        FROM batch_configs bc
+        LEFT JOIN batch_mappings bm ON bc.id = bm.batch_config_id
+        WHERE bc.id = $1
+        GROUP BY bc.id`,
+        [configId]
+      );
+      
+      const config = configResult[0] || null;
 
       if (!config) {
         logger.warn(`배치 설정을 찾을 수 없습니다: ID ${configId}`);
@@ -455,10 +489,11 @@ export class BatchSchedulerService {
     try {
       if (mapping.from_connection_type === 'internal') {
         // 내부 DB에서 조회
-        const result = await prisma.$queryRawUnsafe(
-          `SELECT * FROM ${mapping.from_table_name}`
+        const result = await query<any>(
+          `SELECT * FROM ${mapping.from_table_name}`,
+          []
         );
-        return result as any[];
+        return result;
       } else {
         // 외부 DB에서 조회 (구현 필요)
         logger.warn('외부 DB 조회는 아직 구현되지 않았습니다.');
@@ -485,9 +520,13 @@ export class BatchSchedulerService {
             // 매핑된 컬럼만 추출
             const mappedData = this.mapColumns(record, mapping);
             
-            await prisma.$executeRawUnsafe(
-              `INSERT INTO ${mapping.to_table_name} (${Object.keys(mappedData).join(', ')}) VALUES (${Object.values(mappedData).map(() => '?').join(', ')})`,
-              ...Object.values(mappedData)
+            const columns = Object.keys(mappedData);
+            const values = Object.values(mappedData);
+            const placeholders = values.map((_, i) => `$${i + 1}`).join(', ');
+            
+            await query(
+              `INSERT INTO ${mapping.to_table_name} (${columns.join(', ')}) VALUES (${placeholders})`,
+              values
             );
             successCount++;
           } catch (error) {