Remove the old local build script; the catalogue is now built by the GPU prep notebook

Build: 3,000 products, vectors from NVIDIA RTX PRO 6000 Blackwell Server Edition

Prices in US dollars (same products, images and vectors)

Part 1 table: 500 random rows so category counts differ

Workshop catalogue v1: 3,000 products, CLIP ViT-B/32 image vectors

initial commit