(Re)add etime and cmd into process stats

[asmacdo]

Fixes #174

[codecov]

Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

Project coverage is 94.92%. Comparing base (7057bf2) to head (9cb2218).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
src/con_duct/__main__.py	72.72%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #175      +/-   ##
==========================================
- Coverage   95.42%   94.92%   -0.50%     
==========================================
  Files           2        2              
  Lines         459      473      +14     
  Branches       70       73       +3     
==========================================
+ Hits          438      449      +11     
- Misses         10       12       +2     
- Partials       11       12       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[asmacdo]

Tests are failing on AssertionError assert self.cmd == other.cmd

This shouldn't happen, could indicate a bigger issue-- process stat aggregation can only occur for the same process/cmd. I'll investigate whats going on with that.

[yarikoptic]

And don't we have some integration test with known children processes ? (Some sleeps etc?)

[yarikoptic]

and note that it doesn't fail consistently, so it is something flaky or incorrect assumption somewhere!

[asmacdo]

2 failing tests were:

• Test / test (ubuntu-latest, 3.12, py) (pull_request)
• Test / test (ubuntu-latest, pypy-3.9, py) (pull_request)

Rerunning to see if its flake or version dependent.

[asmacdo]

All checks passed. Rerunning CI for a sanity check since this has been flakey.