Update mission_planner.py

mission_planner.py

@@ -2,6 +2,7 @@ import logging
 from typing import List, Dict, Any, Set
 from reasoning_engine import reasoning_engine
 from semantic_normalizer import semantic_normalizer
+from semantic_hub import semantic_hub
 from mission_engine import MissionRule, parse_mission
 
 logger = logging.getLogger(__name__)