feat: 添加爬虫统计信息页面和功能

新增爬虫统计信息页面，展示各来源的爬取数量、最新更新时间、错误信息等统计指标
后端添加爬虫统计信息存储和查询接口，记录每次爬取的结果
支持按关键词过滤招标信息查询

src/bids/services/bid.service.ts

@@ -88,7 +88,7 @@ export class BidsService {
       .getMany();
   }
 
-  async getBidsByDateRange(startDate?: string, endDate?: string) {
+  async getBidsByDateRange(startDate?: string, endDate?: string, keywords?: string[]) {
     const qb = this.bidRepository.createQueryBuilder('bid');
 
     if (startDate) {
@@ -103,6 +103,49 @@ export class BidsService {
       qb.andWhere('bid.publishDate <= :endDate', { endDate: end });
     }
 
+    if (keywords && keywords.length > 0) {
+      const keywordConditions = keywords.map((keyword, index) => {
+        return `bid.title LIKE :keyword${index}`;
+      }).join(' OR ');
+      qb.andWhere(`(${keywordConditions})`, keywords.reduce((params, keyword, index) => {
+        params[`keyword${index}`] = `%${keyword}%`;
+        return params;
+      }, {}));
+    }
+
     return qb.orderBy('bid.publishDate', 'DESC').getMany();
   }
+
+  async getCrawlInfoAddStats() {
+    const { InjectRepository } = require('@nestjs/typeorm');
+    const { Repository } = require('typeorm');
+    const { CrawlInfoAdd } = require('../../crawler/entities/crawl-info-add.entity');
+
+    // 获取每个来源的最新一次爬虫记录
+    const query = `
+      SELECT
+        source,
+        count,
+        latestPublishDate,
+        error,
+        createdAt as latestUpdate
+      FROM crawl_info_add
+      WHERE id IN (
+        SELECT MAX(id)
+        FROM crawl_info_add
+        GROUP BY source
+      )
+      ORDER BY source ASC
+    `;
+
+    const results = await this.bidRepository.query(query);
+
+    return results.map((item: any) => ({
+      source: item.source,
+      count: item.count,
+      latestUpdate: item.latestUpdate,
+      latestPublishDate: item.latestPublishDate,
+      error: item.error,
+    }));
+  }
 }