chore: import upstream snapshot with attribution

apps/webapp/app/runEngine/concerns/dequeueGate.server.ts

@@ -0,0 +1,29 @@
+import { getMeter } from "@internal/tracing";
+import { env } from "~/env.server";
+import {
+  baseWorkerQueue,
+  matchesDisabledWorkerQueue,
+  parseDisabledWorkerQueues,
+} from "./workerQueueSplit.server";
+
+const meter = getMeter("run-engine-dequeue-gate");
+
+const blockedDequeueCounter = meter.createCounter("run_engine.dequeue.blocked", {
+  description:
+    "Count of worker dequeue requests refused because the worker queue is gated off via RUN_ENGINE_DEQUEUE_DISABLED_WORKER_QUEUES",
+});
+
+const disabledWorkerQueues = parseDisabledWorkerQueues(
+  env.RUN_ENGINE_DEQUEUE_DISABLED_WORKER_QUEUES
+);
+
+export function isWorkerQueueDequeueDisabled(workerQueue: string): boolean {
+  return matchesDisabledWorkerQueue(workerQueue, disabledWorkerQueues);
+}
+
+export function recordBlockedDequeue(workerQueue: string): void {
+  blockedDequeueCounter.add(1, {
+    worker_queue: workerQueue,
+    region: baseWorkerQueue(workerQueue),
+  });
+}