The row count is not updated in time during adding index

[tangenta]

Enhancement

#42769 sets the flush interval to 10 minutes, which makes the ROW_COUNT field from admin show ddl jobs zero.

mysql> admin show ddl jobs 1;
+--------+---------+------------+------------------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------------------+---------+
| JOB_ID | DB_NAME | TABLE_NAME | JOB_TYPE               | SCHEMA_STATE         | SCHEMA_ID | TABLE_ID | ROW_COUNT | CREATE_TIME         | START_TIME          | END_TIME            | STATE   |
+--------+---------+------------+------------------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------------------+---------+
|    138 | sbtest  | sbtest1    | add index /* ingest */ | write reorganization |        88 |       90 |         0 | 2023-04-17 20:08:17 | 2023-04-17 20:08:17 | NULL                | running |
+--------+---------+------------+------------------------+----------------------+-----------+----------+-----------+---------------------+---------------------+---------------------+---------+