fix: round limit_price to 2 decimal places before order submit

Alpaca rejects prices with more than 2 decimal places (code 42210000).
Affected BAC on first live tick.

bot/alpaclaudia/executor.py

@@ -55,7 +55,7 @@ def _build_request(intent: OrderIntent) -> Any:
             **common,
         )
     if intent.order_type == "limit":
-        return LimitOrderRequest(limit_price=intent.limit_price, **common)
+        return LimitOrderRequest(limit_price=round(intent.limit_price, 2), **common)
     return MarketOrderRequest(**common)