fix(ci): use annotated tag and scope bump detection to commit subject

[0x56696B]

Summary

• Switch from lightweight to annotated git tag — --follow-tags only pushes annotated tags, so the lightweight tag was never reaching the remote and gh release create was failing
• Scope bump-type detection to first line of commit message (head -1) — full message body can contain BREAKING CHANGE in documentation text, causing false major bumps (triggered 0.1.0 → 1.0.0 instead of 0.1.1 on the first pipeline run)

Test plan

• Merge triggers pipeline
• Annotated tag vX.Y.Z appears on remote after run
• GitHub Release created with dist artifacts