fix: use proper image registry for stable release

[mckornfield]

Summary by CodeRabbit

• Bug Fixes
  • Corrected stable release packaging to use the designated container image registry when publishing Helm charts.
  • Improved consistency between stable release images and their Helm chart configuration.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Enterprise

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📥 Commits

Reviewing files that changed from the base of the PR and between d478469 and 52cdf5b.

📒 Files selected for processing (1)

• .github/workflows/release.yaml

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📝 Walkthrough

Walkthrough

The release workflow adds STABLE_IMAGE_REGISTRY and uses it in the stable Helm chart packaging step instead of RELEASE_HELM_REGISTRY.

Changes

Stable image registry

Layer / File(s)	Summary
Helm stable registry wiring .github/workflows/release.yaml	Adds the stable image registry workflow variable and passes it to the stage-helm packaging step.

Possibly related PRs

• NVIDIA-NeMo/nemo-platform#696: Updates stable/nightly registry handling in the same Helm packaging workflow.

Suggested reviewers: crookedstorm, svvarom

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the change to use a dedicated stable image registry for Helm releases.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-image-registry-helm-chart/mck

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[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	28219/36050	78.3%	62.7%
Integration Tests	16767/34768	48.2%	20.8%