feat(scanner): add cycle budget observability (#3166)

* feat(scanner): add cycle budget observability

* fix(scanner): clear cycle state after budget stop

* test(scanner): stabilize timeout-based scanner tests

* fix(scanner): keep cycle ILM counts scanner-only

* test(scanner): avoid test-only pending import

---------

Co-authored-by: Henry Guo <marshawcoco@users.noreply.github.com>
Co-authored-by: houseme <housemecn@gmail.com>
Co-authored-by: 安正超 <anzhengchao@gmail.com>

crates/scanner/src/data_usage_define.rs

@@ -1377,8 +1377,7 @@ mod tests {
             let attempts = attempts_clone.clone();
             async move {
                 attempts.fetch_add(1, Ordering::SeqCst);
-                tokio::time::sleep(Duration::from_millis(50)).await;
-                Ok(())
+                std::future::pending::<StorageResult<()>>().await
             }
         })
         .await;