Summary:
Ref T10537. This adds an update daemon for pulling item data (e.g., figuring out who the author of a GitHub comment is) and routing items (e.g., sending them to a queue or applying them directly to a task).
Also adds `bin/nuance update --item X` for doing this manually for debugging.
And adds item types, for specializing item behavior. Previously, sources completely dictated item behavior, but I think we want something a little more flexible.
Test Plan:
- This still does nothing.
- Ran `bin/nuance update --item 15`.
- Saw an item route to a default queue.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10537
Differential Revision: https://secure.phabricator.com/D15441
