feat: allow hook model overrides

src/cron/types.ts

@@ -11,6 +11,8 @@ export type CronPayload =
   | {
       kind: "agentTurn";
       message: string;
+      /** Optional model override (provider/model or alias). */
+      model?: string;
       thinking?: string;
       timeoutSeconds?: number;
       deliver?: boolean;