Update `check-daml-warts.sh` to handle comments at the end of lines

This is something I found when trying to commit some Scala changes -- the check-daml-warts.sh script that's run on pre-commit flags the words fetch and archive in comments that appear at the end of a Daml line, like here.

<img width="2716" height="812" alt="Image" src="https://github.com/user-attachments/assets/b4687f67-ad87-4d8c-a544-961af1c2df9b" />