939f940499
- Introduced a new ValidationService for customer operations to ensure valid username formats. - Updated customer service and handler to utilize the new validation service, enhancing input validation during registration and updates. - Modified CreateCustomerForm and UpdateCustomerForm to enforce username validation rules. - Adjusted repository indexing to improve search efficiency by refining the text index for customer data. - Ensured consistent handling of usernames across the customer module, improving overall data integrity and user experience.