DM: more detailed query-status

[okJiang]

Is your feature request related to a problem?

no

Describe the feature you'd like

add some status:

• duration(from unit start)
• instantaneous speed
  • for dump: bytes/s dumpling: add recent speed to dump status tidb#38456
  • for load: bytes/s lightning(dm): add current speed in status #7212
  • for sync: rows/s(now is tps), in fact, tps is the rps(rows per sec), a naming problem
• progress
  • for dump: calculate by chunks dumpling: add progress to dumpling's status tidb#38625
  • for load: calculate by rows(bytes is accurate)
• completed phase's detail dm(engine): add finished_unit_status in DM QueryJobStatus #7386

Describe alternatives you've considered

No response

Teachability, Documentation, Adoption, Migration Strategy

display in TiDB cloud

[okJiang]

/area dm

[okJiang]

/assign

[lance6716]

Duration (start-time) should be kept across failover, for DM in engine scenario only the metaDB is survived across failover, so we might only add this field to the response of engine job's status.