feat:更新智能体架构

config/db.py

@@ -1,31 +0,0 @@
-import os
-
-from dotenv import load_dotenv
-from sqlalchemy import create_engine
-from sqlalchemy import text
-
-load_dotenv()
-
-engine = create_engine(
-    os.getenv("DB_URL"),
-    pool_pre_ping=True,
-)
-
-conn = engine.connect()
-
-
-def is_select(sql: str) -> bool:
-    return sql.lower().lstrip().startswith("select")
-
-
-def execute_sql(sql: str):
-    if not is_select(sql):
-        raise ValueError("只允许 SELECT 查询")
-
-    result = conn.execute(text(sql))
-    rows = result.fetchall()
-    columns = result.keys()
-    return {
-        "columns": list(columns),
-        "rows": rows
-    }