feat(api): add unified request utility with type definitions

Implement a centralized API request utility with proper TypeScript interfaces
for bid items, AI recommendations, and crawl statistics. The utility handles
base URL configuration, request/response typing, and error handling.

src/crawler/services/eps_target.ts

@@ -229,7 +229,7 @@ export const EpsCrawler = {
       const errorMessage =
         error instanceof Error ? error.message : String(error);
       logger.error(`Failed to crawl ${this.name}: ${errorMessage}`);
-      return allResults;
+      throw error;
     } finally {
       await page.close();
     }