Async load + project + stage step for one Lines node. Mirrors the
prior inline lines-branch of updateView.
Unlike Points and GSplats, line bounds already encode the non-displayed
extent. The shared extendedToleranceCache parameter is therefore unused
here; lines read raw tolerance from the global view-state.
Async load + project + stage step for one Lines node. Mirrors the prior inline lines-branch of
updateView.Unlike Points and GSplats, line bounds already encode the non-displayed extent. The shared extendedToleranceCache parameter is therefore unused here; lines read raw tolerance from the global view-state.