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AlertEvent sans secret ; HttpAlertSender (POST webhook n8n, best-effort) + NullAlertSender ; buildDailyDigest / selectExpiringSoon purs. 6 tests. Rattrape l'entrée CHANGELOG 0.15.1 omise. Palier de risque : reversible. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>