Main merge release/26.04

[ramakrishnap-nv]

For #990

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

Changes add pip constraint generation to CI test scripts, introduce third-party integration tests for PuLP and Pyomo, add presolve file output support to C++ solvers, and update CUDA dependency specifications across dependencies.yaml and pyproject.toml.

Changes

Cohort / File(s)	Summary
CI Test Scripts with Pip Constraints ci/test_self_hosted_service.sh, ci/test_wheel_cuopt.sh, ci/test_wheel_cuopt_server.sh	Updated scripts to call rapids-generate-pip-constraints before installing wheels, adding --prefer-binary and --constraint flags to pip install commands to enforce generated dependency constraints.
CI Third-Party Integration Tests ci/thirdparty-testing/run_pulp_tests.sh, ci/thirdparty-testing/run_pyomo_tests.sh	New Bash scripts that automate building and testing PuLP and Pyomo from source against cuOpt. Both require PIP_CONSTRAINT environment variable, install packages in editable mode with constraints, run pip check, and execute cuopt-filtered pytest suites with 5-minute timeouts.
C++ Linear Programming Configuration cpp/include/cuopt/linear_programming/constants.h, cpp/include/cuopt/linear_programming/.../solver_settings.hpp	Added CUOPT_PRESOLVE_FILE constant and new presolve_file string member field to both mip_solver_settings_t and pdlp_solver_settings_t structs to enable presolve output file configuration.
C++ Solver Implementation cpp/src/math_optimization/solver_settings.cu, cpp/src/mip_heuristics/solve.cu, cpp/src/pdlp/solve.cu	Extended solver settings constructor to initialize presolve_file parameter bindings and added conditional logic in MIP and PDLP solvers to write presolved problems to MPS files when presolve is enabled and output path is specified.
Dependencies & Package Configuration dependencies.yaml, python/libcuopt/pyproject.toml	Updated CUDA version handling to remove support for versions 12.0 and 12.4, added explicit toolkit version requirements for supported CUDA versions, and replaced unpinned nvidia packages with version-constrained dependencies (cuda-toolkit, nvidia-cudss, nvidia-nvjitlink).
Documentation docs/cuopt/source/conf.py	Added nb_execution_excludepatterns configuration to exclude routing-example.ipynb from Sphinx notebook execution.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ❌ 3

❌ Failed checks (1 warning, 2 inconclusive)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Title check	❓ Inconclusive	The title 'Main merge release/26.04' is vague and does not clearly summarize the main changes in the pull request.	Use a more descriptive title that highlights the primary change, such as 'Add presolved problem output and improve CI/testing for CUDA 13.0 and third-party integrations'.
Description check	❓ Inconclusive	The description references issue #990 but provides minimal context about the actual changes included in the pull request.	Expand the description to briefly summarize the key changes: presolve file output, CUDA 13.0 dependencies, third-party testing (PuLP/Pyomo), and CI improvements.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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