Task T3.2: AiJobService.getArtifact/accept/reject assertOwns on artifact.job.scopeId;
listArtifacts scoped to caller. CalendarService.getMeeting/setConsent/generateTranscript/
summarize/listActionItems assertOwns on meeting.scopeId (optional principal → asserts
when supplied by a controller, skipped for internal calls). MessageService.getMessageById
gains the same optional fence. Controllers thread the principal through. All 46
ai/calendar/routing/messaging tests green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
maaz519
ed0d4dae80