cronPush function
origin: kt_ifm_gtid_mob/lib/cron.dart author: anovsiradj, opencode-go/glm-5.2 version: 2025-03-04, revised: 2026-08-17
Register fungsi under jadwal cron pattern. If sekali = true, runs once then auto-removes.
Implementation
void cronPush(String jadwal, CronHandleTypedef fungsi, [bool sekali = false]) {
cronInit(jadwal);
if (cronBekerjas.contains(fungsi)) return;
cronAntrians[jadwal] ??= [];
if (cronAntrians[jadwal]!.contains(fungsi)) return;
cronAntrians[jadwal]!.add(fungsi);
if (sekali) cronSekalis.add(fungsi);
}