fix(schedules): cron sample for schema test, lint cleanups

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/src/modules/schedules/registry.ts

@@ -42,7 +42,7 @@ export interface JobRunResult {
   agentRunId?: string | null;
 }
 
-export type JobRunFn = (c: JobRunContext) => Promise<JobRunResult | undefined | void>;
+export type JobRunFn = (c: JobRunContext) => Promise<JobRunResult | undefined>;
 
 export interface ScheduledJobDef {
   /** 稳定 key(表主键),如 feeds.poll */