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/cdt_target.ts

@@ -337,7 +337,7 @@ export const CdtCrawler = {
       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();
     }

src/crawler/services/ceic_target.ts

@@ -242,7 +242,7 @@ export const CeicCrawler = {
       const errorMessage =
         error instanceof Error ? error.message : String(error);
       logger.error(`Crawl failed: ${errorMessage}`);
-      return allResults;
+      throw error;
     } finally {
       if (page) await page.close();
     }

src/crawler/services/cgnpc_target.ts

@@ -229,7 +229,7 @@ export const CgnpcCrawler = {
       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();
     }

src/crawler/services/chdtp_target.ts

@@ -159,7 +159,7 @@ export const ChdtpCrawler = {
       const errorMessage =
         error instanceof Error ? error.message : String(error);
       logger.error(`Failed to crawl ${this.name}: ${errorMessage}`);
-      return allResults; // Return what we have so far
+      throw error;
     } finally {
       await page.close();
     }

src/crawler/services/chng_target.ts

@@ -366,7 +366,7 @@ export const ChngCrawler = {
       const errorMessage =
         error instanceof Error ? error.message : String(error);
       logger.error(`Crawl failed: ${errorMessage}`);
-      return allResults;
+      throw error;
     } finally {
       if (page) await page.close();
     }

src/crawler/services/cnncecp_target.ts

@@ -228,7 +228,7 @@ export const CnncecpCrawler = {
       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();
     }

src/crawler/services/cnooc_target.ts

@@ -229,7 +229,7 @@ export const CnoocCrawler = {
       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();
     }

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();
     }

src/crawler/services/espic_target.ts

@@ -269,7 +269,7 @@ export const EspicCrawler = {
       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();
     }

src/crawler/services/powerbeijing_target.ts

@@ -229,7 +229,7 @@ export const PowerbeijingCrawler = {
       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();
     }

src/crawler/services/sdicc_target.ts

@@ -239,7 +239,7 @@ export const SdiccCrawler = {
       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();
     }

src/crawler/services/szecp_target.ts

@@ -248,7 +248,7 @@ export const SzecpCrawler = {
       const errorMessage =
         error instanceof Error ? error.message : String(error);
       logger.error(`Crawl failed: ${errorMessage}`);
-      return allResults;
+      throw error;
     } finally {
       if (page) await page.close();
     }