Synchronize common files from prometheus/prometheus

[prombot]

Propagating changes from prometheus/prometheus default branch.

Source can be found here.

To check out this branch locally and push changes back:

git remote add prombot https://github.com/prombot/prometheus_alertmanager.git
git fetch prombot repo_sync
git checkout -b repo_sync prombot/repo_sync

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📝 Walkthrough

Walkthrough

Adds a GitHub Actions workflow that approves pending workflows from a qualified pull-request comment and adds synchronization-source headers to three workflows and the yamllint configuration.

Changes

Workflow automation and metadata

Layer / File(s)	Summary
Pending workflow approval .github/workflows/approve-workflows.yml	Adds an issue-comment trigger and conditionally runs the pinned approval action for /workflow-approve comments on pull requests in the Prometheus repository.
Synchronization headers .github/workflows/container_description.yml, .github/workflows/govulncheck.yml, .github/workflows/stale.yml, .yamllint	Adds comments identifying the Prometheus repository as the synchronization source without changing behavior or configuration.

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

Sequence Diagram(s)

sequenceDiagram
  participant GitHub
  participant approve_job
  participant approve_workflows
  GitHub->>approve_job: created /workflow-approve comment on pull request
  approve_job->>approve_workflows: invoke action with github.token
  approve_workflows->>GitHub: write actions and pull-request state

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Possibly related PRs

• prometheus/alertmanager#5187: Updates related synchronized workflow content in govulncheck.yml.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is too minimal and does not include the required checklist or release-notes sections from the template.	Add the checklist items, any linked issues, and a completed release-notes block or NONE, following the template.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarizes the main change: syncing common files from prometheus/prometheus.
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

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