Do record ppid per pid record

just adding `ppid` to the list of fields to give to `ps` to output

It might come handy if we decide to do better analytics about memory consumption for

- #399

Start by locating the process-record field list and the entry point that invokes ps. Add ppid to the fields emitted for each pid, then verify that each record includes the parent process ID and that existing process output remains intact.

Written by the indexing model from the issue text.