client-go

region_cache: return nil reason from GetTiFlashRPCContext (#1959)

txn: reject unsupported shared lock transaction paths (#1956)

internal/locate: disable replica read and stale-read feature in nextgen (#1949)

config: increase default RUScale from 1.40 to 2.10 (#1950)

txnkv: reduce mem / goroutine costs for resolve lock tasks (#1940)