Add missing "oauth_server_edge" tables

Summary: Fixes T10975. The "scramble attached file permissions when an object is saved" code is misfiring here too. See T10778 + D15803 for prior work.

Test Plan:

• Ran bin/storage upgrade -f.
• Edited the view policy of an OAuth server (prepatch: fatal; postpatch: worked great).

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10975

Differential Revision: https://secure.phabricator.com/D15938