Lint icq-relayer

[joe-bowman]

Summary

icq-relayer was created outside of the Quicksilver repository, and was never subject to the same linting process as the main repo.

Linting for icq-relayer was added in #1912 but not enabled in CI until the work has been done.

• Lint icq-relayer and fix issues
• Enable CI linting for icq-relayer directory