Issue #1: Wrapped DELETE + INSERT operations in updateContactMultiValues in transaction to prevent inconsistent state if INSERT fails after DELETE.
Issue #2: Replaced N+1 query pattern with batch INSERT statements using VALUES list for phones, emails, and addresses. Also optimized primary entry check queries to use SELECT 1 instead of COUNT(*).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ulas Kalayci
c4b8b76221