let owner likes authorize owner-gated tools in batch mode
_is_owner was always False in batch mode because author_handle is set
to "" when processing multiple notifications. now checks whether the
owner is among the batch's notification authors — a like counts as
presence, so liking a phi post can confirm a pending action.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>