Fix FURB110 lint: use `or` instead of ternary for v_head_size
Replace `config.v_head_size if config.v_head_size else config.head_size`
with `config.v_head_size or config.head_size` per ruff FURB110.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Agent-signed-off: Developer (b0ebe545) [claude-opus-4.6]
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>