feat(perception): qualify E33 worker shadow

src/k1link/compute/live_perception.py

@@ -592,17 +592,21 @@ class LatestWinsQueue[T]:
         self._dropped_superseded = 0
         self._closed = False
 
-    def publish(self, item: T) -> None:
+    def publish(self, item: T) -> T | None:
+        """Publish fresh work and return the evicted oldest item, if any."""
+
         with self._condition:
             if self._closed:
                 raise RuntimeError("cannot publish to a closed latest-wins queue")
+            dropped: T | None = None
             if len(self._items) == self._capacity:
-                self._items.popleft()
+                dropped = self._items.popleft()
                 self._dropped_overflow += 1
             self._items.append(item)
             self._published += 1
             self._maximum_depth = max(self._maximum_depth, len(self._items))
             self._condition.notify()
+            return dropped
 
     def take_next(self, timeout: float | None = None) -> T | None:
         with self._condition: