Fix tests

[danlooo]

CI tests are currently broken due to:

• file timestats.jl is missing
• lazy artefacts can not be loaded

[codecov]

Codecov Report

❌ Patch coverage is 26.53061% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.76%. Comparing base (d351007) to head (ea42ef4).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/cluster.jl	0.00%	33 Missing ⚠️
src/main.jl	81.25%	3 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (d351007) and HEAD (ea42ef4). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (d351007)	HEAD (ea42ef4)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #120       +/-   ##
===========================================
- Coverage   74.03%   56.76%   -17.28%     
===========================================
  Files           5        6        +1     
  Lines         208      266       +58     
===========================================
- Hits          154      151        -3     
- Misses         54      115       +61     

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

🚀 New features to boost your workflow:

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