Implements Task 12: Extend POST /contacts to accept and persist phones,
emails, and addresses arrays. Uses atomic transactions to ensure all
related records are created together or rolled back on error.
- Validation: validatePhones/Emails/Addresses before insert
- Transaction: db.transaction() for atomic Contact + Multi-Values
- Backward compatible: Multi-value fields are optional
- Refactoring: Extracted loadMultiValueFields() helper (DRY)
- Response includes all multi-value fields with generated IDs
Tests: 3 new tests (create with multi-values, validation, backward compat)
TDD workflow: RED → GREEN → REFACTOR → Commit
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Ulas Kalayci
966a6d46e3