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refactor(jwt): unify jwt configuration and token expiration handling

feat(jwt): add logging to jwt token operations

fix(user_service): correct token logging by removing truncation

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

feat(auth): implement refresh token functionality

feat(profile): implement jwt-protected profile endpoint with service layer

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

Add initial implementation of User Management Service