fix: recover auction finalization across worker restarts

app/game-api/src/services/pollingWorkerLifecycle.ts

@@ -0,0 +1,46 @@
+export interface PollingWorkerControl {
+    readonly signal: AbortSignal;
+    dispose(): void;
+}
+
+/**
+ * SIGINT/SIGTERM 또는 test AbortSignal을 하나의 idempotent stop signal로
+ * 합칩니다. Signal은 새 poll만 막고 현재 처리 중인 작업은 caller가 끝낸 뒤
+ * finally에서 resource를 닫게 합니다.
+ */
+export const createPollingWorkerControl = (externalSignal?: AbortSignal): PollingWorkerControl => {
+    const controller = new AbortController();
+    const stop = () => controller.abort();
+
+    process.on('SIGINT', stop);
+    process.on('SIGTERM', stop);
+    externalSignal?.addEventListener('abort', stop, { once: true });
+    if (externalSignal?.aborted) {
+        stop();
+    }
+
+    let disposed = false;
+    return {
+        signal: controller.signal,
+        dispose: () => {
+            if (disposed) return;
+            disposed = true;
+            process.off('SIGINT', stop);
+            process.off('SIGTERM', stop);
+            externalSignal?.removeEventListener('abort', stop);
+        },
+    };
+};
+
+export const waitForWorkerPoll = async (signal: AbortSignal, delayMs: number): Promise<void> => {
+    if (signal.aborted || delayMs <= 0) return;
+    await new Promise<void>((resolve) => {
+        const timeout = setTimeout(finish, delayMs);
+        function finish() {
+            clearTimeout(timeout);
+            signal.removeEventListener('abort', finish);
+            resolve();
+        }
+        signal.addEventListener('abort', finish, { once: true });
+    });
+};