feat:문서 resolve/upsert API 추가- React 연동용 resolve API (GET /documents/resolve)

- Upsert API (POST /documents/upsert)
- ResolveRequest, UpsertRequest FormRequest 생성
- DocumentService에 resolve/upsert 로직 추가
- document_category common_codes 마이그레이션
- 에러/성공 메시지 i18n 추가

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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

@@ -7,8 +7,10 @@
 use App\Http\Requests\Document\ApproveRequest;
 use App\Http\Requests\Document\IndexRequest;
 use App\Http\Requests\Document\RejectRequest;
+use App\Http\Requests\Document\ResolveRequest;
 use App\Http\Requests\Document\StoreRequest;
 use App\Http\Requests\Document\UpdateRequest;
+use App\Http\Requests\Document\UpsertRequest;
 use App\Services\DocumentService;
 use Illuminate\Http\JsonResponse;
 
@@ -71,6 +73,32 @@ public function destroy(int $id): JsonResponse
         }, __('message.deleted'));
     }
 
+    // =========================================================================
+    // Resolve/Upsert (React 연동용)
+    // =========================================================================
+
+    /**
+     * 문서 Resolve
+     * GET /v1/documents/resolve?category=incoming_inspection&item_id=12596
+     */
+    public function resolve(ResolveRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->resolve($request->validated());
+        }, __('message.fetched'));
+    }
+
+    /**
+     * 문서 Upsert
+     * POST /v1/documents/upsert
+     */
+    public function upsert(UpsertRequest $request): JsonResponse
+    {
+        return ApiResponse::handle(function () use ($request) {
+            return $this->service->upsert($request->validated());
+        }, __('message.saved'));
+    }
+
     // =========================================================================
     // 결재 워크플로우
     // =========================================================================