opa340na: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding)
opa340na: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero
Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout")
opa340na: backfill missing artifacts (hero, etch, variants)
opa340na: 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)
opa340na: factory component page (tier=lcsc)
Initial commit: component/opa340na