Enable manual package publish retry via workflow_dispatch in build workflow

[Copilot]

Publishing was previously tied to tag pushes only, which blocked recovery when a publish failed after a tag already existed. This change adds a manual trigger path to rerun publish without creating a new tag.

• Workflow trigger updates

  • Added workflow_dispatch to .github/workflows/build.yml.
  • Added a boolean dispatch input publish_package (default false) to make manual publish explicit.

• Publish step gating

  • Updated publish condition to run when either:
    • event is push on a tag ref, or
    • event is workflow_dispatch with publish_package == true.
  • Keeps existing tag-based release behavior intact while enabling controlled manual retries.

• Relevant workflow condition

  if: (github.event_name == 'push' && startsWith(github.ref, 'refs/tags')) || (github.event_name == 'workflow_dispatch' && inputs.publish_package)