20260605 ROA增量验证和rsync host失败短路

src/analysis/timing.rs

@@ -71,6 +71,14 @@ impl TimingHandle {
             .or_insert(inc);
     }
 
+    pub fn counts_snapshot(&self) -> HashMap<String, u64> {
+        let g = self.inner.lock().expect("timing lock");
+        g.counts
+            .iter()
+            .map(|(key, value)| ((*key).to_string(), *value))
+            .collect()
+    }
+
     /// Record a phase duration directly in nanoseconds.
     ///
     /// This is useful when aggregating sub-phase timings locally (to reduce lock contention)