fix(logging): bound ECStore debug output (#6809)

Also replace deprecated Atomic::fetch_update calls with try_update so the
current Rust toolchain keeps lint and CI jobs warning-clean.

Co-authored-by: heihutu <heihutu@gmail.com>

crates/iam/src/lib.rs

@@ -131,7 +131,7 @@ pub(crate) async fn notify_iam_load_user(access_key: &str, temp: bool) -> Vec<Ia
         assert!(!probe.panic, "notification probe panic");
         let should_fail = probe
             .remaining_failures
-            .fetch_update(std::sync::atomic::Ordering::SeqCst, std::sync::atomic::Ordering::SeqCst, |remaining| {
+            .try_update(std::sync::atomic::Ordering::SeqCst, std::sync::atomic::Ordering::SeqCst, |remaining| {
                 remaining.checked_sub(1)
             })
             .is_ok();