feat: 근태관리/직원관리 API 구현

- AttendanceController, AttendanceService 추가
- EmployeeController, EmployeeService 추가
- Attendance 모델 및 마이그레이션 추가
- TenantUserProfile에 employee_status 컬럼 추가
- DepartmentService 트리 조회 기능 개선
- Swagger 문서 추가 (AttendanceApi, EmployeeApi)
- API 라우트 등록

app/Http/Controllers/Api/V1/EmployeeController.php

@@ -0,0 +1,114 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Employee\IndexRequest;
+use App\Http\Requests\Employee\StoreRequest;
+use App\Http\Requests\Employee\UpdateRequest;
+use App\Services\EmployeeService;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class EmployeeController extends Controller
+{
+    public function __construct(private EmployeeService $service) {}
+
+    /**
+     * 사원 목록 조회
+     * GET /v1/employees
+     */
+    public function index(IndexRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->index($request->validated());
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 사원 상세 조회
+     * GET /v1/employees/{id}
+     */
+    public function show(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->show($id);
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 사원 등록
+     * POST /v1/employees
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->store($request->validated());
+        }, __('message.created'));
+    }
+
+    /**
+     * 사원 수정
+     * PATCH /v1/employees/{id}
+     */
+    public function update(int $id, UpdateRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->update($id, $request->validated());
+        }, __('message.updated'));
+    }
+
+    /**
+     * 사원 삭제 (퇴직 처리)
+     * DELETE /v1/employees/{id}
+     */
+    public function destroy(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->destroy($id);
+        }, __('message.deleted'));
+    }
+
+    /**
+     * 사원 일괄 삭제
+     * POST /v1/employees/bulk-delete
+     */
+    public function bulkDelete(Request $request): JsonResponse
+    {
+        $request->validate([
+            'ids' => 'required|array|min:1',
+            'ids.*' => 'integer|min:1',
+        ]);
+
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->bulkDelete($request->input('ids'));
+        }, __('message.bulk_deleted'));
+    }
+
+    /**
+     * 사원 통계
+     * GET /v1/employees/stats
+     */
+    public function stats(): JsonResponse
+    {
+        return ApiResponse::handle(function () {
+            return $this->service->stats();
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 시스템 계정 생성
+     * POST /v1/employees/{id}/create-account
+     */
+    public function createAccount(int $id, Request $request): JsonResponse
+    {
+        $request->validate([
+            'password' => 'required|string|min:8',
+        ]);
+
+        return ApiResponse::handle(function () use ($id, $request) {
+            return $this->service->createAccount($id, $request->input('password'));
+        }, __('message.updated'));
+    }
+}