- **Schemas:** Introduce unit tests for `OrganizationBase`, `OrganizationCreate`, and `OrganizationUpdate` schemas. Validate edge cases for slug and name validation.
- **Validators:** Add tests for `validate_password_strength`, `validate_phone_number`, `validate_email_format`, and `validate_slug`. Cover edge cases, boundary conditions, and defensive code paths.
- **Exception Handlers:** Ensure proper error handling in organization, user, and session CRUD operations. Mock database errors and validate exception responses.
- Include test cases to verify robust behavior, normalization, and failure scenarios across schema and validation logic.
- Deleted `test_crud_base.py`, `test_crud_error_paths.py`, and `test_organization_async.py` due to the removal of corresponding deprecated CRUD implementations.
- Improved codebase maintainability and reduced test suite noise by eliminating obsolete test files.
