ci(C1): thin caller for reusable-promote workflow

[castrojo]

Summary

Consistency audit C1: replace the 183-line promote-testing-to-main.yml with a 30-line thin caller to the shared reusable-promote reusable workflow in projectbluefin/actions.

Before: 183-line workflow with full digest resolution, release-state.yaml management, PR creation, gate checks
After: 30-line caller — all logic in projectbluefin/actions/reusable-promote.yml@8487dff # v1

Adoption order (canary-first per consistency audit)

1. dakota (this PR) — 1 variant pair, lowest user impact ← here
2. bluefin-lts — observe one promotion cycle
3. bluefin — highest user impact, land last

Closes automation-audit C1 (partial — canary step).

Assisted-by: Claude Sonnet 4.5 via pi

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 5accc911-3321-4007-a81f-e1d11e2c705c

📥 Commits

Reviewing files that changed from the base of the PR and between ba3f131 and 2f33e09.

📒 Files selected for processing (1)

• .github/workflows/promote-testing-to-main.yml

📝 Walkthrough

Walkthrough

The promote-testing-to-main workflow is refactored from an inline promotion implementation to a thin caller. The ~183-line promotion job is replaced with a delegated call to a reusable workflow, passing variants and cosign_identity_regexp configuration while removing all inlined digest resolution, release-state management, branch handling, and PR creation logic.

Changes

Workflow delegation refactoring

Layer / File(s)	Summary
Refactor promote job to reusable workflow delegation .github/workflows/promote-testing-to-main.yml	The promote job description is updated and the job implementation is replaced with a call to projectbluefin/actions/.github/workflows/reusable-promote.yml, passing variants and cosign_identity_regexp inputs that preserve the original promotion intent while removing ~160 lines of inline digest resolution, release-state management, branch handling, and PR creation steps.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related issues

• [consistency C1] Land reusable-promote.yml in projectbluefin/actions common#584: Main change refactors promote-testing-to-main to call projectbluefin/actions/.github/workflows/reusable-promote.yml, which directly implements the exact proposal to land and use reusable-promote.yml.

Possibly related PRs

• projectbluefin/dakota#757: Both PRs refactor .github/workflows/promote-testing-to-main.yml to delegate its existing digest/release-state/PR-creation logic to a reusable workflow, directly overlapping the same promotion workflow behavior.
• projectbluefin/dakota#760: Both PRs modify .github/workflows/promote-testing-to-main.yml, with the main PR refactoring its promotion logic into a reusable workflow call while PR #760 adds a scheduled trigger to the same workflow.

Suggested labels

area/ci, kind/improvement

Suggested reviewers

• p5
• tulilirockz

Poem

🐰 A workflow once thick with inline code,
Now lighter, cleaner—a reusable road,
Delegation brings order to Dakota's domain,
Promotion flows neat through the action's refrain!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 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	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title 'ci(C1): thin caller for reusable-promote workflow' accurately reflects the main change: refactoring the workflow from inline implementation to a thin caller delegating to a reusable workflow.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/c1-thin-caller-test

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[github-actions]

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