[CHORE] Enforce release PR title format as release: X.Y.Z

[c-vigo]

Chore Type

CI / Build change

Description

The release PR failed the "Validate PR Title" check because the current title format (Release 0.3.0) does not satisfy repository commit-title rules.

Standardize release PR titles to:

• release: X.Y.Z

This should be applied by release automation and documented in release process guidance.

Acceptance Criteria

• Release PRs are created with title format release: X.Y.Z
• Validate PR Title passes for release PRs
• Release workflow/tests/docs are updated so this format is preserved
• Existing release PR creation path is validated with a real or dry-run check

Implementation Notes

• Investigate where release PR titles are generated in workflows/scripts.
• Update release PR title generation from Release X.Y.Z to release: X.Y.Z.
• Verify compatibility with validate-commit-msg --subject-only / PR title checks.
• Check whether PR template hints should be updated for release branches.

Related Issues

• Related to PR chore: release 0.3.0 #270
• Failed run: https://github.com/vig-os/devcontainer/actions/runs/23002702709/job/66791079620?pr=270

Priority

High

Changelog Category

No changelog needed

Additional Context

This blocks merging the release PR until title validation succeeds.