Allow bypassing lattice conformation
The current lattice conformation strategy is thorough but does not scale for large input geometry sets (>10k line segments). Use of a spatial index (#1) or the improved mesh datatype in QGIS 3.22+ would alleviate this.
Until such new containers can be implemented, a solution for workflows requiring large segment counts (e.g. building outlines) would be to support disabling the lattice conformation process altogether from the quality meshing widget.
Instructions on how to manually tidy up GIS data for use with Triangle should be added to the Repository Wiki and referenced in the plugin.