新增返回pg配置信息

postgresql_info.py

@@ -17,4 +17,20 @@ def get_pgconn_string(
     db_user=pg_user,
     db_password=pg_password,
 ):
+    """返回 PostgreSQL 连接字符串"""
     return f"dbname={db_name} host={db_host} port={db_port} user={db_user} password={db_password}"
+
+
+def get_pg_config():
+    """返回 PostgreSQL 配置变量的字典"""
+    return {
+        "name": pg_name,
+        "host": pg_host,
+        "port": pg_port,
+        "user": pg_user,
+    }
+
+
+def get_pg_password():
+    """返回密码（谨慎使用）"""
+    return pg_password