HA: inspect the I/O jitters on kvdb if using separate mount paths. #18463
Description
Development Task
This issue originates from customer requirements following the previous enhancement in #17884, which aimed to improve TiKV’s SLA during I/O hangs on KVDB (when deployed with separate mount paths).
Recent customer feedback highlighted the need to extend detection coverage to I/O jitters, ensuring TiKV can automatically recover from abnormal states caused by KVDB I/O jitters.
Therefore, this ticket is built to tracks the development efforts to enhance TiKV’s I/O jitter detection and recovery mechanism.