feat(config): add configurable default shutdown delay for shutdown actions

ts/action-orchestration.ts

@@ -34,6 +34,22 @@ export function buildUpsActionContext(
   };
 }
 
+export function applyDefaultShutdownDelay(
+  actions: IActionConfig[],
+  defaultDelayMinutes: number,
+): IActionConfig[] {
+  return actions.map((action) => {
+    if (action.type !== 'shutdown' || action.shutdownDelay !== undefined) {
+      return action;
+    }
+
+    return {
+      ...action,
+      shutdownDelay: defaultDelayMinutes,
+    };
+  });
+}
+
 export function decideUpsActionExecution(
   isPaused: boolean,
   ups: IUpsActionSource,