Добавьте файлы проекта.

Configuration/CrawlerOptions.cs

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+namespace CRAWLER.Configuration;
+
+internal sealed class CrawlerOptions
+{
+    public string BaseUrl { get; set; } = "https://www.ktopoverit.ru";
+    public string CatalogPathFormat { get; set; } = "/poverka/gosreestr_sredstv_izmereniy?page={0}";
+    public int RequestDelayMilliseconds { get; set; } = 350;
+    public int DefaultPagesToScan { get; set; } = 1;
+    public string PdfStoragePath { get; set; } = "%LOCALAPPDATA%\\CRAWLER\\PdfStore";
+    public int TimeoutSeconds { get; set; } = 30;
+    public string UserAgent { get; set; } = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) CRAWLER/1.0";
+}