3.4.0.2版本中在计数窗口流计算中使用group_concat聚合函数会引发宕机和报错

Bug Description
3.4.0.2版本中在计数窗口流计算中使用group_concat聚合函数会引发宕机和报错

Environment (please complete the following information):

• OS: Linux
• TDengine Version 3.4.2

Additional Context
Add any other context about the problem here.
建表脚本如下：
taos> CREATE STABLE IF NOT EXISTS s_ptr_data (
> ts TIMESTAMP,
> test_value double,
> test_value_str VARCHAR(16),
> test_flag INT,
> hi_limit double,
> lo_limit double
> ) TAGS (
> factory VARCHAR(32),
> fileid VARCHAR(64),
> testnum INT,
> testtxt VARCHAR(256),
> headnum INT,
> sitenum INT,
> productid VARCHAR(64),
> lotid VARCHAR(64),
> sublotid VARCHAR(64),
> jobname VARCHAR(128),
> flowid VARCHAR(32),
> datatype VARCHAR(10),
> nodename VARCHAR(32),
> dutindex INT
> );
Create OK, 0 row(s) affected (0.015924s)

创建流计算脚本如下
taos>
taos> CREATE STREAM s1 COUNT_WINDOW(10)
> FROM s_ptr_data PARTITION BY tbname
> INTO output
> AS
> SELECT LAST(ts) AS ts, AVG(test_value) AS avg_test_value, GROUP_CONCAT(test_value_str, ',') AS test_value_array
> FROM s_ptr_data;

DB error: Row length exceeds max length 65531 [0x8000263E] (0.029885s)

当s_ptr_data 表写入数据后，会引发所有数据库的连接超时以及宕机
目前观察下来，docker，window端都会崩溃

Reproduce the failure using the provided s_ptr_data schema and CREATE STREAM COUNT_WINDOW(10) query with GROUP_CONCAT, then verify behavior after inserting rows. Start by tracing stream aggregation and row-length handling around GROUP_CONCAT; done means the query no longer causes connection timeouts or database crashes on the reported environments and returns a valid result or controlled error.