[API] Finalize experiment JSON before archiving failed runs

[podkidyshev]

Summary

A failed run's default .tgz could capture experiment.json while its status was still running and its finish time was unset. Finalize the experiment before generating ordinary and DSE reports, so failure archives contain the same final snapshot as the results directory.

Test Plan

• Automated CI.
• Local standalone Sleep smoke with the workload success hook forced to fail: the archived and local experiment.json matched, with status: failed and a finish time.

Additional Notes

N/A

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• src/cloudai/cli/handlers.py

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📝 Walkthrough

Walkthrough

Installation handling now uses a shared helper. Non-DSE jobs run directly through the runner. DSE exceptions are recorded and re-raised, and report generation occurs during finalization. Tests verify failure details in local experiment data and generated archives.

Changes

Experiment execution and reporting

Layer / File(s)	Summary
Installation checks and handling src/cloudai/handlers.py	Install mode and experiment execution use a shared installation helper. The helper checks component status, handles mode-specific marking, installs missing components, and raises InstallationError when installation fails.
Execution, failure handling, and reports src/cloudai/handlers.py, src/cloudai/cli/handlers.py, tests/test_api.py, tests/test_handlers.py	Non-DSE jobs run directly through the runner. Unexpected DSE exceptions are recorded and re-raised, and test runs are restored. Report generation runs during finalization. Tests check local and archived experiment results, including failure status and finish time.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Merge Risk: 🟡 Moderate · up to 8a4a9

Direct experiment entrypoints can finish without producing their expected reports. Preserve reporting for those calls before merging.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: finalizing experiment JSON before archiving failed runs.
Description check	✅ Passed	The description directly explains the failed-run archive issue and the implemented finalization behavior. It also includes relevant validation steps.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @src/cloudai/handlers.py:
- Line 333: At src/cloudai/handlers.py lines 333-333, add report finalization
for direct DSE calls while avoiding duplicate generation through
execute_experiment; at src/cloudai/cli/handlers.py lines 85-85, preserve report
generation after runner.run() for direct non-DSE calls instead of returning
immediately.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository: NVIDIA/cloudai/.coderabbit.yaml
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📥 Commits

Reviewing files that changed from the base of the PR and between 805227d and 8a4a914.

📒 Files selected for processing (4)

• src/cloudai/cli/handlers.py
• src/cloudai/handlers.py
• tests/test_api.py
• tests/test_handlers.py

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