Local playground fixtures

fixtures.py contains translated native rules, one coupon, one sales channel and an active provider-free order graph. It is data for ../playground.py, not a second commerce engine. The CLI authenticates a personal account and creates a separate shop through the existing API; every definition is saved with revision zero only when absent. Existing edits and installations survive repeated setup.

The state file contains the local origin, shop ID and optional account email; passwords/session tokens remain in memory only. Files use mode 0600 and reject symlinks. Setup rejects remote origins, bootstrap identities and saved shops outside its playground namespace/current owner memberships.

The real HTTP integration in ../automation.py invokes the CLI twice and verifies both order branches, metadata and invoice generation. Credential/URL/file guards also have negative tests in ../testing/tooling_tests.py.

Merchant walkthrough.