feat(energy): 新增 cooperation_type 和 auto_match 字段，标记旧导入接口废弃

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sql/energy/energy_alter_frontend.sql

@@ -0,0 +1,3 @@
+-- energy_alter_frontend.sql
+ALTER TABLE energy_bill ADD COLUMN cooperation_type TINYINT DEFAULT NULL COMMENT '合作模式（1=预充值 2=月结算）' AFTER station_name;
+ALTER TABLE energy_station_config ADD COLUMN auto_match TINYINT DEFAULT 1 COMMENT '自动匹配开关（0=关闭 1=开启）' AFTER cooperation_type;