Implement Proper Validation Across the API #18
Description
Currently, there is no proper or fully implemented validation in the project. This can lead to inconsistent or unsafe data being accepted by the API endpoints.
Recommended Actions:
- Review all request DTOs and entities for missing or incomplete validation annotations.
- Implement comprehensive validation for all input fields (e.g., not null, format checks, length constraints, etc.).
- Ensure validation errors are handled gracefully and returned with clear messages to API consumers.
- Add tests to cover various validation scenarios and edge cases.
Proper validation will improve API reliability, data integrity, and security.