ci: add stable required check

[michaelbrusegard]

Summary

• set read-only default workflow permissions
• add a stable ci job over the existing UI validation
• provide one durable status context for the shared branch ruleset

Validation

• library production build
• documentation production build
• oxlint
• oxfmt
• actionlint

Summary by CodeRabbit

• Chores
  • Updated continuous integration permissions to read-only access.
  • Added a required validation step that reports failure when checks do not pass.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: d04a2a39-3bdd-43bf-b258-5c7ade99c0a6

📥 Commits

Reviewing files that changed from the base of the PR and between 2c799d2 and ce650be.

📒 Files selected for processing (1)

• .github/workflows/ci.yaml

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📝 Walkthrough

Walkthrough

The CI workflow now grants read-only repository content access. It also adds a required ci aggregation job that always runs after check and succeeds only when check succeeds.

Changes

CI workflow enforcement

Layer / File(s)	Summary
Permissions and CI result aggregation .github/workflows/ci.yaml	The workflow sets read-only contents permissions. The always-running ci job depends on check and fails unless needs.check.result is success.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 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 identifies the main change: adding a stable required CI check.
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 chore/align-ci-release-rules

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