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

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

apps/server/test/schedules/schedules.test.ts

@@ -209,6 +209,7 @@ describe.skipIf(!hasPg)("定时任务注册表(真实 PG)", () => {
         defaults: { name: "锁", group: "maintain", schedule: { type: "interval", everyMs: 1 } },
         run: async () => {
           ran.push(name);
+          return {};
         },
       });
     }