fix: JSON_CONTAINS 参数类型修复 + API sync

- 修复 JSON_CONTAINS(node_group_ids, int64) 类型错误，改为传 JSON 字符串
- 添加 node_group_ids IS NOT NULL 兼容判断，防止 NULL 列报错
- 同步 apis/ 及 routes.go、compat_types.go 改动

Co-Authored-By: claude-flow <ruv@ruv.net>

apis/public/subscribe.api

@@ -71,5 +71,9 @@ service ppanel {
 	@doc "Get user subscribe node info"
 	@handler QueryUserSubscribeNodeList
 	get /node/list returns (QueryUserSubscribeNodeListResponse)
+
+	@doc "Get subscribe group list"
+	@handler QuerySubscribeGroupList
+	get /group/list returns (QuerySubscribeGroupListResponse)
 }