feat: ga-core + ga-api + ga-batch + V13-V15 + Docker + frontend skeleton

ga-core (22 tables):
- user/role: VO + Mapper + XML (login + RBAC)
- org: Grade, Organization (CTE recursive tree), Agent + history
- product: InsuranceCompany, Product, Contract
- rule: CommissionRate, PayoutRule, OverrideRule, ChargebackRule, ExceptionTypeCode
- receive: CompanyProfile, FieldMapping, CodeMapping, RawCommissionData, ParseError
- ledger: Recruit, Maintain, Exception (batch insert + cursor)
- settle: SettleMaster (UPSERT), Override, Chargeback, Payment, Reconciliation, BatchJobLog
- All XMLs use EncryptTypeHandler for PII fields

ga-api:
- AuthController: login (lock on N fails), refresh, me, password, logout
- Domain controllers: Agent, Organization, Contract, Company, Product, Rule,
  Receive, Ledger (recruit/maintain/exception + approve), Settle (confirm/hold/release),
  Payment, User, Role (matrix), BatchTrigger
- All use @RequirePermission + @DataChangeLog

ga-batch:
- MonthlySettlementJob: 8 Steps (receiveData, transformData, reconcile,
  calcRecruit, calcMaintain, chargebackException, calcOverride, aggregate)
- DataReceiver strategy + ManualReceiver, MappingEngine stub
- CommissionCalculator (pct/tax via MoneyUtil), JobLauncherController

DB V13~V15:
- V13: 14 indexes (settle_master, ledgers, contract, chargeback, payment, raw, logs)
- V14: create_monthly_partition() helper function
- V15: v_agent_monthly_summary, v_org_settle_summary, v_chargeback_risk views

Infra:
- docker-compose: postgres + redis + api + batch + frontend
- Multi-stage Dockerfile (gradle build → JRE)

ga-frontend (skeleton):
- Vite + React 18 + TypeScript + AntD 5 + AG Grid + React Query + Zustand
- API request layer (axios + JWT), LoginPage, MainLayout (dynamic menu), Dashboard
- nginx.conf for /api proxying

ga-frontend/src/api/request.ts

@@ -0,0 +1,61 @@
+import axios, { AxiosError } from 'axios';
+import { message } from 'antd';
+
+export interface ApiResponse<T> {
+  success: boolean;
+  code: string;
+  message: string;
+  data: T;
+  timestamp: string;
+}
+
+export interface PageResponse<T> {
+  list: T[];
+  pageNum: number;
+  pageSize: number;
+  total: number;
+  pages: number;
+}
+
+const api = axios.create({
+  baseURL: import.meta.env.VITE_API_URL ?? '',
+  timeout: 60_000,
+});
+
+api.interceptors.request.use((config) => {
+  const token = localStorage.getItem('accessToken');
+  if (token) config.headers.Authorization = `Bearer ${token}`;
+  return config;
+});
+
+api.interceptors.response.use(
+  (res) => {
+    const body = res.data;
+    if (body && typeof body === 'object' && 'success' in body && body.success === false) {
+      message.error(body.message ?? '오류가 발생했습니다');
+      return Promise.reject(body);
+    }
+    return res;
+  },
+  (err: AxiosError<ApiResponse<unknown>>) => {
+    const status = err.response?.status;
+    const body = err.response?.data;
+    if (status === 401) {
+      localStorage.removeItem('accessToken');
+      window.location.href = '/login';
+    } else if (status === 403) {
+      message.error(body?.message ?? '권한이 없습니다');
+    } else {
+      message.error(body?.message ?? err.message ?? '서버 오류');
+    }
+    return Promise.reject(err);
+  },
+);
+
+export default api;
+
+/** ApiResponse<T> 의 data 만 풀어서 반환 */
+export async function unwrap<T>(p: Promise<{ data: ApiResponse<T> }>): Promise<T> {
+  const res = await p;
+  return res.data.data;
+}