fixed kv router issue

Author: umang-kedia-hpe

examples/llm/components/kv_router.py

@@ -185,6 +185,11 @@ def _update_and_get_active_blocks(self, worker_id: str, polled_value: int) -> in
         This allows the router to account for requests that have been dispatched but
         not yet reflected in the polled metrics.
         """
+        # Initialize if worker_id is not present
+        if worker_id not in self.active_blocks_dict:
+            self.active_blocks_dict[worker_id] = [polled_value, polled_value]
+            return polled_value
+    
         old_value, predictive_value = self.active_blocks_dict[worker_id]
 
         # Check if polled value is different from old value