Fix greeting detection to only trigger on exact simple greetings

src/retrieval/query_handler.py

@@ -59,9 +59,9 @@ def classify_query(query: str) -> str:
     """Classify the type of query based on keywords and patterns."""
     query_lower = query.lower().strip()
     
-    # Greetings - only for very short greetings
-    greetings = ["hello", "hi", "hey", "greetings", "good morning", "good afternoon", "good evening"]
-    if any(greeting in query_lower for greeting in greetings) and len(query.split()) <= 3:
+    # Greetings - only exact matches of simple greetings
+    simple_greetings = ["hello", "hi", "hey", "greetings", "good morning", "good afternoon", "good evening"]
+    if query_lower in simple_greetings:
         return QueryType.GREETING
     
     # Keyword search - trigger if "keyword" appears anywhere