fix: add RunnableConfig to workflow.ainvoke and astream_events calls

backend/agents/workflow.py

@@ -14,6 +14,7 @@ from datetime import datetime, timezone
 from decimal import Decimal
 
 from langgraph.graph import StateGraph, END
+from langchain_core.runnables import RunnableConfig
 from backend.models.agent_state import AgentState, MCPCall
 from backend.agents.portfolio_analyst import PortfolioAnalystAgent
 from backend.agents.personas import create_persona_agent, PersonaType
@@ -647,7 +648,10 @@ class PortfolioAnalysisWorkflow:
         """
         logger.info(f"Starting portfolio analysis workflow for {len(initial_state['holdings'])} holdings")
 
-        result = await self.workflow.ainvoke(initial_state)
+        result = await self.workflow.ainvoke(
+            initial_state,
+            config=RunnableConfig(configurable={}, recursion_limit=25)
+        )
 
         logger.info("Workflow complete")
         return result
@@ -690,7 +694,8 @@ class PortfolioAnalysisWorkflow:
         }
 
         final_state = None
-        async for event in self.workflow.astream_events(initial_state, version="v2"):
+        config = RunnableConfig(configurable={}, recursion_limit=25)
+        async for event in self.workflow.astream_events(initial_state, version="v2", config=config):
             if event["event"] == "on_chain_end":
                 node_name = event.get("name", "")
                 if node_name in phase_info: