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/crawler/crawler.module.ts

@@ -1,10 +1,12 @@
 import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
 import { BidCrawlerService } from './services/bid-crawler.service';
 import { CrawlerController } from './crawler.controller';
 import { BidsModule } from '../bids/bids.module';
+import { CrawlInfoAdd } from './entities/crawl-info-add.entity';
 
 @Module({
-  imports: [BidsModule],
+  imports: [BidsModule, TypeOrmModule.forFeature([CrawlInfoAdd])],
   controllers: [CrawlerController],
   providers: [BidCrawlerService],
   exports: [BidCrawlerService],