fix: approve smoke-test release PR before downstream release

[c-vigo]

Description

Smoke-test repository_dispatch orchestration marks the release PR ready and dispatches release.yml, but release-core.yml requires reviewDecision == APPROVED. The release app cannot self-approve its own PR. This PR adds a ready-release-pr job step that approves the release PR using github.token, with job-scoped pull-requests: write, so downstream Release Core validation passes without manual approval.

Type of Change

• fix -- Bug fix
• feat -- New feature
• docs -- Documentation only
• chore -- Maintenance task (deps, config, etc.)
• refactor -- Code restructuring (no behavior change)
• test -- Adding or updating tests
• ci -- CI/CD pipeline changes
• build -- Build system or dependency changes
• revert -- Reverts a previous commit
• style -- Code style (formatting, whitespace)

Modifiers

• Breaking change (!) -- This change breaks backward compatibility

Changes Made

• assets/smoke-test/.github/workflows/repository-dispatch.yml
  • Set permissions: contents: read and pull-requests: write on job ready-release-pr.
  • Add step Approve release PR for automated dispatch using GH_TOKEN: ${{ github.token }} and gh pr review … --approve after release-kind labeling.
• CHANGELOG.md / assets/workspace/.devcontainer/CHANGELOG.md
  • Document fix under ## [0.3.1] - TBD → ### Fixed (#430).

Changelog Entry

This PR targets release/0.3.1; the active section is ## [0.3.1] - TBD (not ## Unreleased). Added under ### Fixed:

- **Smoke-test dispatch approves release PR before downstream release** ([#430](https://github.com/vig-os/devcontainer/issues/430))
  - Grant `pull-requests: write` on `ready-release-pr` and approve with `github.token` (`git*hub-actions[bot]`)
  - Satisfy `release-core.yml` approval gate without the release app self-approving its own PR

Testing

• Tests pass locally (just test)
• Manual testing performed (describe below)

Manual Testing Details

N/A — workflow change; verify on next smoke-test dispatch after template is deployed to devcontainer-smoke-test.

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly (edit docs/templates/, then run just docs)
• I have updated CHANGELOG.md in the [Unreleased] section (and pasted the entry above)
• My changes generate no new warnings or errors
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

Additional Notes

Base branch: release/0.3.1. Changelog entries are under ## [0.3.1] - TBD (release branch), not ## Unreleased — the template checklist item above is left unchecked for that reason.

Branch protection on the smoke-test repo must allow git*hub-actions[bot] reviews to count toward required approvals if applicable.

Refs: #430

[Copilot]

Pull request overview

This PR fixes smoke-test release orchestration by ensuring the downstream release validation gate (reviewDecision == APPROVED) can be satisfied automatically before release.yml is dispatched.

Changes:

• Grant pull-requests: write on the ready-release-pr job in the smoke-test repository_dispatch workflow.
• Add a step to approve the release PR using github.token (github-actions[bot]) so release-core.yml approval checks pass without manual intervention.
• Document the fix in both the root changelog and the workspace template changelog.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
assets/smoke-test/.github/workflows/repository-dispatch.yml	Adds job-scoped permissions and an automated PR approval step prior to triggering release.yml.
CHANGELOG.md	Records the smoke-test approval fix under the 0.3.1 release-branch section.
assets/workspace/.devcontainer/CHANGELOG.md	Mirrors the changelog entry into the workspace template.

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