modifies orchestrator,add code_exec tool, openai_chat (later we add chat)

orchestrator_functions.py

@@ -612,6 +612,7 @@ async def csv_chart(csv_url: str, query: str):
 
         except Exception as openai_error:
             logger.info(f"OpenAI failed ({str(openai_error)}), trying raw Groq...")
+            return "Sorry, I couldn't generate a chart..."
             # --- 2. Second Attempt: Raw Groq ---
             try:
                 groq_result = await asyncio.to_thread(groq_chart, csv_url, query)