feat: 문서 관리 시스템 Controller 구현 (Phase 1.6)

- DocumentController CRUD 엔드포인트 구현
- 결재 워크플로우는 기존 시스템 연동을 위해 보류

Co-Authored-By: Claude <noreply@anthropic.com>

app/Http/Controllers/Api/V1/Documents/DocumentController.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Documents;
+
+use App\Helpers\ApiResponse;
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Document\IndexRequest;
+use App\Http\Requests\Document\StoreRequest;
+use App\Http\Requests\Document\UpdateRequest;
+use App\Services\DocumentService;
+use Illuminate\Http\JsonResponse;
+
+class DocumentController extends Controller
+{
+    public function __construct(private DocumentService $service) {}
+
+    /**
+     * 문서 목록 조회
+     * GET /v1/documents
+     */
+    public function index(IndexRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->list($request->validated());
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 문서 상세 조회
+     * GET /v1/documents/{id}
+     */
+    public function show(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->show($id);
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 문서 생성
+     * POST /v1/documents
+     */
+    public function store(StoreRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->create($request->validated());
+        }, __('message.created'));
+    }
+
+    /**
+     * 문서 수정
+     * PATCH /v1/documents/{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'));
+    }
+
+    /**
+     * 문서 삭제
+     * DELETE /v1/documents/{id}
+     */
+    public function destroy(int $id): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($id) {
+            return $this->service->destroy($id);
+        }, __('message.deleted'));
+    }
+
+    // =========================================================================
+    // 결재 관련 메서드 (보류 - 기존 시스템 연동 필요)
+    // =========================================================================
+    // public function submit(int $id): JsonResponse
+    // public function approve(int $id, ApproveRequest $request): JsonResponse
+    // public function reject(int $id, RejectRequest $request): JsonResponse
+    // public function cancel(int $id): JsonResponse
+}