better visibility into the startup process

src/app.py

@@ -109,21 +109,27 @@ def ensure_model():
 model_path = ensure_model()
 
 # Configure local LLM with LlamaCPP
+print("\nInitializing LLM...")
 llm = LlamaCPP(
     model_path=model_path,
     temperature=0.7,
     max_new_tokens=256,
     context_window=2048
 )
+print("LLM initialized successfully")
 
 # Configure global settings
+print("\nConfiguring settings...")
 Settings.llm = llm
 Settings.embed_model = HuggingFaceEmbedding(
     model_name="sentence-transformers/all-MiniLM-L6-v2"
 )
+print("Settings configured")
 
 # Create the index at startup
+print("\nCreating symptom index...")
 symptom_index = create_symptom_index()
+print("Index created successfully")
 
 # --- System prompt ---
 SYSTEM_PROMPT = """