feat: Routes & Service Prisma 전환 완료

완료된 파일:

1. ddlRoutes.ts (2개):
   - ✅ health check: PrismaClient 동적 import 제거
   - ✅ SELECT 1 쿼리를 query() 함수로 변경

2. companyManagementRoutes.ts (2개):
   - ✅ findUnique → queryOne (회사 존재 확인)
   - ✅ update → query (soft delete)

3. multiConnectionQueryService.ts (4개):
   - ✅ executeSelect: $queryRawUnsafe → query
   - ✅ executeInsert: $queryRawUnsafe → query
   - ✅ executeUpdate: $queryRawUnsafe → query
   - ✅ executeDelete: $queryRawUnsafe → query

기술적 개선:
- 동적 import 제거로 성능 향상
- 일관된 쿼리 인터페이스 사용
- 파라미터 전달 방식 통일 (...params → params)

전체 진행률: 50/54 (92.6%)
남은 작업: database.ts (4개 - 제거 예정)

backend-node/src/services/multiConnectionQueryService.ts

@@ -8,7 +8,7 @@ import { ExternalDbConnectionService } from "./externalDbConnectionService";
 import { TableManagementService } from "./tableManagementService";
 import { ExternalDbConnection, ApiResponse } from "../types/externalDbTypes";
 import { ColumnTypeInfo, TableInfo } from "../types/tableManagement";
-import prisma from "../config/database";
+import { query } from "../database/db";
 import { logger } from "../utils/logger";
 
 // 🔧 Prisma 클라이언트 중복 생성 방지 - 기존 인스턴스 재사용
@@ -1002,7 +1002,7 @@ export class MultiConnectionQueryService {
             queryParams.push(...Object.values(conditions));
           }
 
-          return await prisma.$queryRawUnsafe(query, ...queryParams);
+          return await query(query, queryParams);
 
         case "insert":
           if (!data) throw new Error("INSERT 작업에는 데이터가 필요합니다.");
@@ -1019,11 +1019,10 @@ export class MultiConnectionQueryService {
             RETURNING *
           `;
 
-          const insertResult = await prisma.$queryRawUnsafe(
-            insertQuery,
-            ...insertValues
-          );
-          return Array.isArray(insertResult) ? insertResult[0] : insertResult;
+          const insertResult = await query(insertQuery, insertValues);
+          return Array.isArray(insertResult) && insertResult.length > 0
+            ? insertResult[0]
+            : insertResult;
 
         case "update":
           if (!data) throw new Error("UPDATE 작업에는 데이터가 필요합니다.");
@@ -1052,7 +1051,7 @@ export class MultiConnectionQueryService {
             ...Object.values(data),
             ...Object.values(conditions),
           ];
-          return await prisma.$queryRawUnsafe(updateQuery, ...updateParams);
+          return await query(updateQuery, updateParams);
 
         case "delete":
           if (!conditions)
@@ -1068,10 +1067,7 @@ export class MultiConnectionQueryService {
             RETURNING *
           `;
 
-          return await prisma.$queryRawUnsafe(
-            deleteQuery,
-            ...Object.values(conditions)
-          );
+          return await query(deleteQuery, Object.values(conditions));
 
         default:
           throw new Error(`지원하지 않는 작업입니다: ${operation}`);