feat(canary): generator registry (token.Type → Generator)
Lives in its own subpackage to break the otherwise-cyclic import
(generators interface → webbug impl → generators interface): the registry
must import concrete implementations, which themselves import the
generators package for Artifact/TriggerResponse types.
- registry.Config { BaseURL string } (reserved for future stateful generators)
- registry.Registry = map[token.Type]generators.Generator
- registry.Build registers webbug only; subsequent phases append
slowredirect, docx, pdf, kubeconfig, envfile, mysql
Tests assert webbug present, unknown type returns nil, pending types
are not yet claimed, Phase 2 cardinality is exactly 1.
bb95f74579