fix(runtime): run pi tools sequentially

src/main/worker/runtime/pi-agent-factory.ts

@@ -87,5 +87,6 @@ export function createPiAgent(input: PiAgentFactoryInput): Agent {
     beforeToolCall: hooks.beforeToolCall,
     afterToolCall: hooks.afterToolCall,
     transformContext: hooks.transformContext,
+    toolExecution: "sequential",
   });
 }