feat: add analysis-only crypto asset mode

tradingagents/graph/propagation.py

@@ -16,12 +16,13 @@ class Propagator:
         self.max_recur_limit = max_recur_limit
 
     def create_initial_state(
-        self, company_name: str, trade_date: str
+        self, company_name: str, trade_date: str, asset_type: str = "stock"
     ) -> Dict[str, Any]:
         """Create the initial state for the agent graph."""
         return {
             "messages": [("human", company_name)],
             "company_of_interest": company_name,
+            "asset_type": asset_type,
             "trade_date": str(trade_date),
             "investment_debate_state": InvestDebateState(
                 {