[DR] [API] [Registration Page] [LastName] The system allows you to set a 'Прізвище' with numbers

**Environment:** macOS Sequoia 15.3

**Preconditions:**
1. Postman is open
2. The POST method was created
3. Used URL `https://backend.historycode.online/api/auth/register`

**Steps to reproduce:**
1. Use json request where last name have numbers:
{
"name": "Анна",
"surname": "Devid12",
"email": "examplee33ee44ff@gmail.com",
"password": "12QWqw!@",
"passwordConfirmation": "12QWqw!@"
}
2. Click on Send

**Actual result:**
Status code 200 OK

Expected result:
Status code 400 "The Surname field must be a string or array type without numbers or symbols special characters."

User story and test case links: #2085 #2103 #2411