ci(thirdparty-pulp): skip test_numpy_float in nightly cuOpt run

[rgsl888prabhu]

Summary

PuLP's test_numpy_float calls model.solve() without an explicit solver and relies on PuLP's default-solver auto-detection. CUOPT is not on that default list, so in our cuopt-only nightly test environment the call raises PulpError: No solver available and the test fails for reasons unrelated to cuOpt.

This PR deselects the test in ci/thirdparty-testing/run_pulp_tests.sh with an inline comment explaining the cause.

Context — other cuOpt-related PuLP failures

Test	Status
test_unbounded	Fixed upstream by coin-or/pulp#901 (tracked in #1114)
test_integer_infeasible_2	Fixed upstream by coin-or/pulp#901 (tracked in #1114)
test_infeasible_2	Real cuOpt bug — PDLP returns Optimal for an infeasible LP. Tracked in #1115. Not skipped here.
test_numpy_float	This PR

Test plan

• Nightly third-party-PuLP job no longer reports test_numpy_float as failing
• Other cuOpt PuLP tests still execute (no over-broad deselect)

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between f3ab099 and 7ac7fe7.

📒 Files selected for processing (1)

• ci/thirdparty-testing/run_pulp_tests.sh

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📝 Walkthrough

Walkthrough

The PR modifies PuLP test execution in cuOpt-only environments by explicitly deselecting test_numpy_float from the pytest run via --deselect flag, with clarifying comments. The fallback mechanism—running run_tests.py when pytest exits with code 5—remains functionally identical.

Changes

Test Execution Configuration

Layer / File(s)	Summary
Test Filtering Configuration ci/thirdparty-testing/run_pulp_tests.sh	Pytest invocation adds --deselect pulp/tests/test_pulp.py::CUOPTTest::test_numpy_float with comments explaining that this test fails due to PuLP default-solver autodetection not including CUOPT in cuOpt-only environments.
Fallback Behavior ci/thirdparty-testing/run_pulp_tests.sh	Conditional fallback to pulp/tests/run_tests.py when pytest finds no matching tests (exit code 5) is preserved unchanged; this run_tests.py path performs its own solver auto-detection.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically summarizes the main change: skipping test_numpy_float in the nightly cuOpt run for PuLP tests, which directly matches the changeset.
Description check	✅ Passed	The description is directly related to the changeset, explaining the rationale for the test deselection, context about related PuLP failures, and the test plan.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[rgsl888prabhu]

/merge