ci(images): bump docker CUDA to 13.1.0 and Python to 3.14.1

[ramakrishnap-nv]

Summary

• Bump CUDA image matrix: 13.0.0 → 13.1.0 (keeps 12.9.0 for CUDA 12 coverage)
• Bump Python image matrix: 3.13.7 → 3.14.1

These are the latest CUDA and Python versions cuOpt supports per dependencies.yaml (CUDA 13.1 and Python 3.14 entries).

Only the default inputs in .github/workflows/build_test_publish_images.yaml change; the Dockerfile itself already consumes these as build args and needs no edit.

Test plan

• Trigger the build/publish workflow and confirm images build for cuda12.9-py3.14-*, cuda13.1-py3.14-* across amd64 and arm64
• Confirm published tags look correct (nvidia/cuopt:<tag>-cuda12.9-py3.14-<arch>, ...cuda13.1-py3.14-<arch>)
• Confirm test_images.yaml passes against the new tags

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ℹ️ Recent review info

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Run ID: 0a9e84e6-454c-44e6-bcad-bbcaa64cd784

📥 Commits

Reviewing files that changed from the base of the PR and between 4fd5696 and 7d215aa.

📒 Files selected for processing (4)

• .github/workflows/build_test_publish_images.yaml
• README.md
• ci/docker/Dockerfile
• docs/cuopt/source/_static/install-selector.js

✅ Files skipped from review due to trivial changes (2)

• docs/cuopt/source/_static/install-selector.js
• README.md

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📝 Walkthrough

Walkthrough

Updated default version values and related references: GitHub Actions workflow default CUDA upgraded to 13.1.0 and Python to 3.14.4; README and docs strings updated to reflect new nightly image tags; Dockerfile changed to use update-alternatives for Python instead of a symlink. No behavioral workflow logic changes.

Changes

Cohort / File(s)	Summary
Workflow input defaults .github/workflows/build_test_publish_images.yaml	Default on.workflow_call.inputs.cuda_ver changed from ["12.9.0", "13.0.0"] → ["12.9.0", "13.1.0"]; default on.workflow_call.inputs.python_ver changed from ["3.13.7"] → ["3.14.4"].
Documentation / README README.md	Added docs for nightly container images and updated example tags to include cuda12.9-py3.14 and cuda13.1-py3.14, noting alpha (a) tag suffixes.
Docker build logic ci/docker/Dockerfile	Replaced ln -sf /usr/bin/python${PYTHON_SHORT_VER} /usr/bin/python with update-alternatives registrations for /usr/bin/python and /usr/bin/python3 pointing to /usr/bin/python${PYTHON_SHORT_VER} (priority 100).
Docs static JS docs/cuopt/source/_static/install-selector.js	Updated generated nightly container tag strings from V_NEXT.0a-cuda12.9-py3.13 / V_NEXT.0a-cuda13.0-py3.13 to V_NEXT.0a-cuda12.9-py3.14 / V_NEXT.0a-cuda13.1-py3.14 and adjusted corresponding docker run command strings.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title refers to bumping CUDA and Python versions, which matches the main objective. However, the actual changes show Python 3.14.4 (not 3.14.1 as stated) and include additional modifications to Dockerfile and documentation beyond just workflow inputs.
Description check	✅ Passed	The description is related to the changeset and explains the intent to update version matrices. It describes the main changes and their rationale, though it does not capture all file modifications (Dockerfile, README, install-selector.js).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[ramakrishnap-nv]

/merge