fix: [bending] Docker 환경 API 호출 시 internal_url 미사용 500 에러 수정

BendingBaseController, BendingProductController, FileViewController,
DocumentTemplateController에서 API_INTERNAL_URL 미적용으로 Docker 내부
api.sam.kr 연결 실패하던 문제 수정

app/Http/Controllers/FileViewController.php

@@ -19,15 +19,23 @@ public function show(int $id)
 
         $url = Cache::remember($cacheKey, now()->addMinutes(5), function () use ($id) {
             $baseUrl = config('services.api.base_url', 'https://api.sam.kr');
+            $internalUrl = config('services.api.internal_url');
             $apiKey = config('services.api.key');
             $token = session('api_access_token', '');
 
+            $headers = [
+                'X-API-KEY' => $apiKey,
+                'X-TENANT-ID' => session('selected_tenant_id', 1),
+            ];
+
+            if ($internalUrl) {
+                $headers['Host'] = parse_url($baseUrl, PHP_URL_HOST) ?: 'api.sam.kr';
+                $baseUrl = $internalUrl;
+            }
+
             $response = Http::baseUrl($baseUrl)
                 ->withoutVerifying()
-                ->withHeaders([
-                    'X-API-KEY' => $apiKey,
-                    'X-TENANT-ID' => session('selected_tenant_id', 1),
-                ])
+                ->withHeaders($headers)
                 ->withToken($token)
                 ->timeout(10)
                 ->get("/api/v1/files/{$id}/presigned-url");