f54a5d8087
Summary: Ref T2852. This table holds data about external objects and allows us to write edges to them. Objects are identified with an `<applicationType, applicationDomain, objectType, objectID>` tuple. For example, Asana tasks will be, e.g., `<asana, asana.com, asana:task, 93829279873>` or similar. Test Plan: Ran storage upgrade. Reviewers: btrahan Reviewed By: btrahan CC: aran Maniphest Tasks: T2852 Differential Revision: https://secure.phabricator.com/D6271