Describe the bug
When sending a POST review request with text =whitespaces, the system allows it to save.

Precondition:
User is registered, the Bearer token is obtained, and the user has not posted a review on a product.

To Reproduce
Send the POST request as below, and use a valid Bearer token.

curl --location 'https://iced-latte.uk/backend/api/v1/products/ba5f15c4-1f72-4b97-b9cf-4437e5c6c2fa/reviews'
--header 'Content-Type: application/json'
--header 'Authorization: {token}'
--data '{
"text": " ",
"rating": "5"

}'
Expected behavior
The system should reject request with 400 HTTP Status code and return the appropriate error message = "Invalid data".

Actual result
System accept the request, HTTP Status code = 200 and review posted with text = " "