Add pair of nano time and millis time to trace to be able to convert nano time to wall clock

Being able to place trace events on a wall clock timeline is useful when troubleshooting problems and correlating events from different sources.

No files or tests are named in the issue. Start by locating how trace events are created and timestamped, then determine where both nano time and millisecond wall-clock time belong. Done means trace events expose the paired timestamps so nano-time events can be placed on a wall-clock timeline and correlated with other sources.

Written by the indexing model from the issue text.