Ping Yu

/release

cc @iosmanthus @haojinming

> 1. Replace `causal_ts_provider.flush()` with `causal_ts_provider.get_ts()` in `cdc::Endpoint::register_min_ts_event()`. This was fixed by #13326. See [here](https://github.com/tikv/tikv/pull/13326/files#diff-d7efa126ecc8210469f19d8da441c7380b2481f5b167e0f9c44f4260cfaf4680R1155).

The cause of error `KV:Storage:InvalidReqRange` is that `end` is bigger than `upper_bound`(i.e., `Some([2, 0, 0, 0, 0, 0, 0, 1, 255, 1, 0, 0, 0, 51, 220, 2, 0, 255,...

Got it. I think this change is great, and it's very welcome to raise a pull request. @iosmanthus How do you think ?

### Issue Analysis The duration of `raw_get` & `raw_compare_and_swap` is much longer than expect, up to 8s (The metrics in the following diagram is MAX message duration)  We can...

Oh yes, it can.

/merge

/hold

Hold until v6.3.0 code freeze.