This PR adds unit tests for form data handling in the application:
1. `test_list_field_single_value`: Ensures that a single value in a list field is correctly wrapped as a list.
2. `test_alias_field_name_not_accepted`: Ensures that fields with unrecognized aliases return a 422 validation error.
3. `test_optional_int_empty_string`: Ensures that empty strings for optional integer fields are correctly converted to None.
These tests improve coverage for form input validation and ensure consistent API behavior.
Vivansh Vanethiya
Sebastián Ramírez
Motov Yurii
Nico Tonnhofer