A new drawing is metric (measurement 1, millimetre insertion units) and
carries the reference's ISO-25 dimension style as its current style, so
dimensions and annotational constraints draw at readable metric sizes
instead of Standard's imperial 0.18 text.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Sync current main and companion codec changes before preserving unsupported frame rows, rendering in the entity plane, and sharing final layout metrics with placement preview.
