直接新建后端把所有逻辑做完了

backend/service.py

@@ -3,7 +3,7 @@ from sqlalchemy import select, insert, update, delete, and_
 from .database import db_instance
 from .utils import normalize_url
 
-class CrawlerService:
+class CrawlerSqlService:
     def __init__(self):
         self.db = db_instance
 
@@ -202,4 +202,4 @@ class CrawlerService:
             return results
 
 
-crawler_service = CrawlerService()
+crawler_sql_service = CrawlerSqlService()