chore: release Bifrost Helm chart v2.1.27

[BearTS]

Summary

Releases Helm chart version 2.1.27 for Bifrost, publishing the chart package and updating the Helm repository index to make the new version available for installation. The previously separate v2.1.28 changelog has been merged into v2.1.27, consolidating all new features under a single release.

Changes

• Removed the standalone helm-v2.1.28.mdx changelog file and merged its contents into helm-v2.1.27.mdx
• Promoted the Upcoming changelog section in README.md to 2.1.27, documenting:
  • bifrost.auditLogs.objectStorage support for archiving audit events to S3/GCS, including all relevant credential and configuration fields
  • force_single_region field for Vertex AI key configs to skip automatic multi-region endpoint promotion (useful for provisioned throughput)
  • calendar_aligned on bifrost.accessProfiles[*] (top-level), budgets[*], and provider_configs[*].budgets[*] to snap reset windows to calendar boundaries
  • Fix for calendar_aligned on bifrost.governance.virtualKeys[*] which was accepted by schema but not previously rendered into config
  • bifrost.alerting for declarative alert channels and rules with CEL-expression-based, governance-scope-aware rule support
• Removed changelogs/helm-v2.1.28 from docs.json navigation
• Added the 2.1.27 entry to helm-charts/index.yaml pointing to the new chart tarball release

Type of change

• Bug fix
• Feature
• Refactor
• Documentation
• Chore/CI

Affected areas

• Core (Go)
• Transports (HTTP)
• Providers/Integrations
• Plugins
• UI (React)
• Docs

How to test

helm repo add bifrost https://maximhq.github.io/bifrost/helm-charts
helm repo update
helm search repo bifrost --versions | grep 2.1.27
helm install bifrost bifrost/bifrost --version 2.1.27 --dry-run

Expected: version 2.1.27 appears in search results and the dry-run renders without errors.

Breaking changes

• Yes
• No

Related issues

Security considerations

No security implications. Chart release only.

Checklist

• I read docs/contributing/README.md and followed the guidelines
• I added/updated tests where appropriate
• I updated documentation where needed
• I verified builds succeed (Go and UI)
• I verified the CI pipeline passes locally if applicable

[coderabbitai]

📝 Walkthrough

Walkthrough

The Bifrost Helm chart was updated from version 2.1.27 to 2.1.28, with matching changelog and repository index metadata refreshed.

Changes

Helm chart release metadata

Layer / File(s)	Summary
Publish chart version 2.1.28 helm-charts/bifrost/Chart.yaml, helm-charts/bifrost/README.md, helm-charts/index.yaml	Chart metadata, changelog headers, package index details, and the generated timestamp were updated for version 2.1.28.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• maximhq/bifrost#3623: Updates the same Helm chart version and release metadata files.
• maximhq/bifrost#3755: Refreshes the same Bifrost Helm chart metadata for a version bump.
• maximhq/bifrost#4694: Updates the same chart release metadata for a version bump.

Suggested reviewers: akshaydeo, roroghost17, danpiths

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The title points to v2.1.27, but the changeset releases 2.1.28, so it's misleading.	Rename it to release Bifrost Helm chart v2.1.28, or align the chart version if 2.1.27 is intended.

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Description check	✅ Passed	The description includes the required sections and enough implementation, testing, and release details.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 07-10-chore_helm_version_2.1.28

---

_{Comment @coderabbitai help to get the list of available commands.}

[BearTS]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• chore: release Bifrost Helm chart v2.1.27 #5080 👈 (View in Graphite)
• feat: add bifrost.alerting to Helm chart with declarative channels and CEL-based rules #5079
• feat: add audit log object storage (S3/GCS), calendar_aligned fields, force_single_region, and allowOnAllVirtualKeys to Helm chart v2.1.28 #5077
• adds alerting schema to config.schema.json #5078
• dev

This stack of pull requests is managed by Graphite. Learn more about stacking.

[greptile-apps]

Confidence Score: 4/5

This should be fixed before merging.

• The Helm repository index metadata does not expose the intended chart version.
• The documented install command for the new chart version can fail because the index entry still uses the prior version metadata.

helm-charts/index.yaml

Important Files Changed

Filename	Overview
helm-charts/index.yaml	Adds a new Helm repository entry for the chart release metadata.
docs/changelogs/helm-v2.1.27.mdx	Updates the Helm changelog content with the release notes.
docs/changelogs/helm-v2.1.28.mdx	Removes the dedicated Helm changelog page for this release.
docs/docs.json	Updates the Helm changelog navigation.
helm-charts/bifrost/README.md	Updates the chart README changelog section.

_{Reviews (6): Last reviewed commit: "chore: helm version 2.1.28" | Re-trigger Greptile}