This PR replaces the use of `max( id )`, and instead using ``max(
`index` )`` for determining the latest commit status. Building business
logic over an `auto_increment` primary key like `id` is risky and
there’re already plenty of discussions on the Internet.
There‘s no guarantee for `auto_increment` values to be monotonic,
especially upon failures or with a cluster. In the specific case, we met
the problem of commit statuses being outdated when using TiDB as the
database. As [being
documented](https://docs.pingcap.com/tidb/stable/auto-increment),
`auto_increment` values assigned to an `insert` statement will only be
monotonic on a per server (node) basis.
Closes#30074.
(cherry picked from commit 7443a10fc3d722d3326a0cb7b15b208f907c72d7)
