Added TC-API-0.1 for GET /api/health (unauthenticated).
Corrected path from /health to /api/health (GRO-1544).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Created comprehensive UAT playbook covering all 13 route groups with test cases for authentication, client management, pet management, appointment scheduling, services, staff management, invoicing & payments, customer portal, waitlist, search, reports, impersonation, and settings & setup.
Co-Authored-By: Paperclip <noreply@paperclip.ing>