fix: Synology SSO createSession 호출 수정

- insertReturning으로 history_id 반환받기
- createSession에 4개 파라미터 전달 (employeeId, historyId, ip, userAgent)
- setSessionCookie로 세션 쿠키 설정

server/api/auth/synology/verify.post.ts

@@ -2,8 +2,8 @@
  * Synology SSO Access Token 검증 및 로그인 처리
  * POST /api/auth/synology/verify
  */
-import { queryOne, execute } from '~/server/utils/db'
+import { queryOne, execute, insertReturning } from '~/server/utils/db'
-import { createSession } from '~/server/utils/session'
+import { createSession, setSessionCookie } from '~/server/utils/session'
 import { getClientIp } from '~/server/utils/ip'
 
 export default defineEventHandler(async (event) => {
@@ -88,13 +88,21 @@ export default defineEventHandler(async (event) => {
     `, [synologyUsername, employee.employee_id])
     
     // 로그인 이력 기록
-    await execute(`
+    const loginHistory = await insertReturning(`
       INSERT INTO wr_login_history (employee_id, login_type, login_ip, login_at, login_email)
       VALUES ($1, 'SYNOLOGY', $2, NOW(), $3)
+      RETURNING history_id
     `, [employee.employee_id, ip, synologyEmail])
     
     // 세션 생성
-    await createSession(event, employee.employee_id)
+    const userAgent = getHeader(event, 'user-agent') || null
+    const sessionId = await createSession(
+      employee.employee_id,
+      loginHistory.history_id,
+      ip,
+      userAgent
+    )
+    setSessionCookie(event, sessionId)
     
     return {
       success: true,