[quality] No CI workflow runs Python unit tests

[kubestellar-hive]

Finding

testing-lab has only a .github/workflows/lint.yaml that lints Argo YAML templates. There is no workflow that runs pytest on the Python test helpers.

This means:

• Regressions in tests/service_catalog/shared/kube.py are only caught when a real cluster run fails.
• There is no coverage gate preventing broken test infrastructure from merging.
• The tests/shared/wait_for_shell.py script has no automated validation.

Recommendation

Add .github/workflows/unit-tests.yml that:

1. Runs pytest on any pure-Python testable modules on every PR.
2. Sets a --cov-fail-under threshold (suggest 60% to start).
3. Uploads a coverage artifact.

Priority

• Impact: high
• Effort: low

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Filed by quality agent (hold-gated mode)

[hanthor]

Closing as duplicate of #175. This issue covers the same gap: Python test files exist but no CI workflow executes them.