chore(fxt): suppress unused_crate_dependencies for ibapi

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/fxt/src/main.rs

@@ -47,6 +47,8 @@ use dirs as _;
 use futures_util as _;
 use getrandom as _;
 use hex as _;
+#[cfg(feature = "broker-check")]
+use ibapi as _;
 use indicatif as _;
 use keyring as _;
 use owo_colors as _;