Enable coverage for l1 tests

[skyw]

So that it doesn't fail on coverage collection steps.

[copy-pr-bot]

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[greptile-apps]

Greptile Summary

This PR updates tests/ci/L1_Tests_GPU.sh to instrument the nightly convergence tests with coverage run -p, matching the pattern already established by the L0 test scripts, so the downstream coverage collection steps in test-template/action.yml (which call coverage combine and coverage xml) no longer fail on missing coverage data.

Key changes:

• Adds mkdir -p test-results/tests/convergence so the XML report directory exists before tests run.
• Wraps the python $test invocation with coverage run -p --source=emerging_optimizers and captures per-run .coverage.* files (combined by the CI template afterwards).
• Adds --xml_output_file to produce JUnit-style XML reports consumed by the publish-nightly-test-results workflow step.
• Extracts the fixed seed into a fix_seed=77 variable (changing from the original hardcoded 42) to avoid producing identical report filenames/coverage data to L0_Tests_GPU.sh, which already runs these same convergence tests with fix_seed=42.

Confidence Score: 5/5

• Safe to merge — the change is a straightforward alignment with the existing L0 coverage pattern and introduces no logical risk.
• The new script is structurally identical to the corresponding coverage loop already present in L0_Tests_GPU.sh (lines 35–39). The mkdir, coverage run -p, --xml_output_file, and seed variable are all consistent with how L0 tests are instrumented, and coverage combination is handled externally by the CI template. No test logic or coverage source is altered.
• No files require special attention.

Important Files Changed

Filename	Overview
tests/ci/L1_Tests_GPU.sh	Adds coverage instrumentation to nightly convergence tests, creates the test-results directory, and changes the fixed seed from 42 to 77 to avoid colliding with the same seed used by L0_Tests_GPU.sh.

Sequence Diagram

sequenceDiagram
    participant CI as cicd-nightly-tests
    participant Action as test-template/action.yml
    participant Container as Docker Container
    participant Script as L1_Tests_GPU.sh
    participant Coverage as coverage tool

    CI->>Action: invoke with script=L1_Tests_GPU
    Action->>Container: docker run (GPU)
    Action->>Container: bash tests/ci/L1_Tests_GPU.sh

    Container->>Script: execute
    Script->>Container: mkdir -p test-results/tests/convergence
    loop for each *_test.py in tests/convergence/
        Script->>Coverage: coverage run -p --source=emerging_optimizers <test> --seed=77 --xml_output_file=...
        Coverage->>Container: writes .coverage.<pid> partial file
        Coverage->>Container: writes test-results/tests/convergence/*_seed77.xml
    end

    Action->>Container: coverage combine (merges .coverage.* files)
    Action->>Container: coverage xml
    Action->>CI: upload .coverage + coverage.xml artifacts
    Action->>CI: upload test-results/**/*.xml artifacts

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