Tutorial: vendor download names

Problem: vendors re-upload pcss.zip; the browser saves pcss (1).zip. Other vendors version the filename, but old copies still clutter the folder.

connectome-fs keeps one GUID per copy and multiple name tokens so both old and new remain visible when sorting by version or searching by basename.

cargo run -p connectome-cli -- --db demo.db demo
cargo run -p connectome-cli -- --db demo.db query "token:basename=pcss"
cargo run -p connectome-cli -- --db demo.db ls --parent <downloads-guid> --sort version