🕒 Add Test Duration Reporting to Pytest in CI

[bhimrazy]

What does this PR do?

Adds --durations=100 to pytest in the CI workflow to track the slowest tests — useful for performance insights.

Inspired by: LitServe#526

To be useful for #612

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80%. Comparing base (0c2fbc3) to head (bdb3889).
Report is 2 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #614   +/-   ##
===================================
- Coverage    80%    80%   -0%     
===================================
  Files        43     43           
  Lines      6463   6463           
===================================
- Hits       5157   5156    -1     
- Misses     1306   1307    +1     

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.