[DEV] replace unwrap-panic about alex-v1

[hyossid]

• Issue : I think we can only change unwrap-panic to unwrap in the surface layer of our backend application. For example, pool calls equation and equation calls math. Replacing unwrap is possible on pool, but not on equation or math.

This is because unwrap-panic throws runtime error and exits the execution, while unwrap or unwrap-err! just returns an error.
During the runtime , until the public function returns an error and revoke the execution, calculation using the err value happens which internally invokes weird execution and throw totally different error.

To be more detail, best is to check whether changing unwrap-panic to unwrap!-err pair and work. If it does not work, we can just change the things which doest make any trouble.