refactor(logging): change debug to info level for operational logs

refactor(user): rename user_id to customer_id across all modules

feat: add wallet, address, pet and guest management features

feat(auth): add phone number support for authentication

feat(logging): add comprehensive logging across application layers

Fix mobile field reference in user model and update logging level for OTP handling

Refactor user model and service; implement OAuth and OTP login features, enhance JWT handling, and update requirements

Add initial implementation of User Management Service