feat: revise retrieval info for better user guidance (know what the general and hospital only meaning)

app.py

@@ -576,7 +576,7 @@ def create_oncall_interface():
                     choices=["General Only", "Hospital Only", "Combine Both"],
                     label="🔍 Retrieval Mode",
                     value="Combine Both",
-                    info="Choose which medical guidelines to search"
+                    info="Choose which medical guidelines to search. General Only: uses general pipeline; Hospital Only: uses customized pipeline"
                 )
                 
                 # Optional intention override for testing