Wave 3 — Industry packs for workspace identity

Wave 3 keeps the W5 type registry small while making its canonical set product aware. Software projects retain the existing defaults, while studio and agency workspaces can seed their own stable type IDs and human-facing labels.

Pack files are JSON bodies kept under .yaml names so synlynk stays dependency-free. The registry validates type create --kind against the union of shipped pack kinds, while unknown kinds continue to fail closed.

The new synlynk type seed --pack <id> command makes pack selection explicit. identity init --pack <id> uses the same seed path for an empty product store; without a pack it remains software-product-compatible.