R1:abc26aa96f4c

Track total time from task creation to task archival

Summary:
Ref T5401. Depends on D20201. Add timestamps to worker tasks to track task creation, and pass that through to archive tasks. This lets us measure the total time the task spent in the queue, not just the duration it was actually running.

Also displays this information in the daemon status console; see screenshot: {F6225726}

Test Plan:
Stopped daemons, ran `bin/search index --all --background` to create lots of tasks, restarted daemons…