fix: trigger wheels publish when release job runs

[walterbm-cohere]

Description

I notice the workflow to build the python wheels + publish was not running automatically because of a github rule that prevents workflows from running when the release is triggered via an automated process.

So the fix is to explicitly trigger the .github/workflows/python-build-wheels.yml workflow when the auto release process completes. This also now attaches the wheel artifacts to the github release.

How Has This Been Tested?

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Note

Medium Risk
Changes the release automation that publishes to PyPI and uploads artifacts to GitHub releases; misconfiguration could cause skipped publishes or publishing the wrong tag/version.

Overview
Release CI now runs off auto release completion instead of release events. The python-build-wheels workflow is triggered via workflow_run, resolves the latest GitHub release tag, and checks out that tag for all wheel/sdist builds.

It adds a guard to skip the workflow-run path when the resolved version already exists on PyPI, and updates caching behavior (sccache) for non-tag builds. The final release job now uploads built artifacts to the corresponding GitHub release and then publishes them to PyPI.

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