Update booking create/confirm/progress/reserve handlers to support custom_service_ids and custom overrides. Add UNION ALL queries to include custom_services in booking detail, payment summary, scheduling availability, today dashboard, and customer relationship queries. Ultraworked with Sisyphus (https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>