st3485ebdr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding)
Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout")
st3485ebdr: laser-etched CAD + chip hero (factory 2.0.0 backfill)
st3485ebdr: backfill missing artifacts (variants)
st3485ebdr: publish the laser-etched STEP alongside the bare one
pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left)
st3485ebdr: factory component page (tier=lcsc)
Initial commit: component/st3485ebdr