Add coinshuffle-plusplus-part-2 review to wasabi/research-club

[Musab1258]

This PR adds coinshuffle-plusplus-part-2 transcript review to the wasabi/research-club directory.

[realdezzy]

Hey @Musab1258,

Thank you for your contribution! I really appreciate your attention to detail.

I’ve made a few adjustments that you can review to help avoid similar issues in the future. Apologies for the delay in getting back to you—we're working on providing faster feedback going forward.

Keep up the great work, and thanks again for your effort!