v11 Potential Breaking Changes

- deprecate `name`, `email`, and `author` and instead extract those values from the `GH_TOKEN`
- make `canary` hook a series hook instead of bail so multiple plugins can make canaries easily

Start by tracing how name, email, and author are currently handled, then find the canary hook implementation and its plugin dispatch behavior. Review the v11 breaking-change process before making changes. Done means those values are extracted from GH_TOKEN and the canary hook supports multiple plugins without bailing.

Written by the indexing model from the issue text.