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Task 8.2: requestMeeting + fromCallback (bridge) + fromEventClaim (accepted P7 AI EVENT claim, human-confirmed) + direct scheduleDirect. schedule() fails closed via opa, creates meeting + organizer/attendee participants + calendar_event, closes the request, and populates IiosCallbackRequest.meetingRef when bridged. 5 tests: direct/callback/AI genesis, un-accepted claim refused, opa-deny fail-closed. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>