Reapply "整理项目结构，优化配置项"

This reverts commit 2f650dd880.

auto_generator.py

@@ -1,15 +1,15 @@
 # 自动生成数据库表和sqlalchemy对应的Model
 import subprocess
 
-from config.mysql import DB_URL
+from db import DB_URL
 
 if __name__ == '__main__':
     table = input("请输入表名：")
-    out_file = f"photo_review/entity/{table}.py"
+    out_file = f"db/{table}.py"
     command = f"sqlacodegen {DB_URL} --outfile={out_file} --tables={table}"
 
     try:
         subprocess.run(command, shell=True, check=True)
-        print(f"{table}.py文件生成成功！请手动调整Base的声明！")
+        print(f"{table}.py文件生成成功！请检查并复制到合适的文件中！")
     except Exception as e:
         print(f"生成{table}.py文件时发生错误: {e}")