Filter action fetch response to eliminate partial order fills.

src/alpaca/actions.ts

@@ -30,7 +30,9 @@ export class AlpacaActionProvider {
             pageToken: undefined as any,
         }) as Promise<AlpacaActivity[]>).then((activities) => {
             return new ActionFetchResponse(
-                activities.map((activity) => {
+                activities
+                .filter((activity) => activity.order_status === "filled")
+                .map((activity) => {
                     return new Action(
                         activity.symbol,
                         parseInt(activity.qty, 10),