* fix: add missing grant_types field to instance config OAuth structs Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: add missing display_name and tenant fields to instance config OAuthClient Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>