fix(worker): park far-future jobs in a KV due queue (#2144)

fluxer_api/src/api/worker/WorkerLaneConfig.ts

@@ -72,6 +72,7 @@ const LANE_CONFIG = {
 			'processInactivityDeletions',
 			'processPendingBulkMessageDeletions',
 			'processPremiumStateReconciliationQueue',
+			'processScheduledJobQueue',
 			'prunePostgresKvTtl',
 			'refreshSearchIndex',
 			'syncDiscoveryIndex',
@@ -213,6 +214,13 @@ function resolveWorkerLanes(config: WorkerLaneRuntimeConfig): Array<WorkerLaneDe
 	});
 }
 
+const SCHEDULED_JOB_DRAIN_INTERVALS_PER_ACK_WAIT = 2;
+
+function resolveScheduledJobDrainIntervalSeconds(): number {
+	const minimumAckWaitMs = Math.min(...WORKER_LANES.map((lane) => lane.ackWaitMs));
+	return Math.max(1, Math.floor(minimumAckWaitMs / SCHEDULED_JOB_DRAIN_INTERVALS_PER_ACK_WAIT / 1000));
+}
+
 function resolveCronSchedulerEnabled(mode: APIWorkerMode, configuredValue: boolean | undefined): boolean {
 	if (configuredValue !== undefined) {
 		return configuredValue;
@@ -245,4 +253,10 @@ export function findLaneForTask(taskName: string): APIWorkerLaneName | null {
 }
 
 export type {WorkerLaneDefinition};
-export {resolveCronSchedulerEnabled, resolveWorkerLanes, validateLaneCompleteness, WORKER_LANES};
+export {
+	resolveCronSchedulerEnabled,
+	resolveScheduledJobDrainIntervalSeconds,
+	resolveWorkerLanes,
+	validateLaneCompleteness,
+	WORKER_LANES,
+};