API: Remove trailing slashes from endpoints

[Ayush8923]

Is your feature request related to a problem?
There is an inconsistency with trailing slashes in some of the endpoints, leading to confusion and potential errors in API calls.

Describe the solution you'd like

• Remove trailing slashes from all endpoints in the backend while ensuring backward compatibility.

Original issue

Describe the current behavior

• So currently in some of the endpoint the traling slashs added and some of the endpoints not.

Describe the enhancement you'd like

• So this is the inconsistency across the application, so from the backend side we have implement this and remove the trailing slashes from all the endpoints with backward compatibility.