feat: synchronize account icons across game profiles

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

@@ -0,0 +1,40 @@
+export interface ResourceCleanupStep {
+    name: string;
+    run: () => Promise<void>;
+}
+
+/**
+ * 종료 단계 하나가 실패해도 나머지 연결을 모두 닫고, 다음 호출에서는 실패한
+ * 단계만 재시도합니다. 동시에 들어온 종료 요청은 같은 실행을 공유합니다.
+ */
+export const createBestEffortResourceCloser = (steps: readonly ResourceCleanupStep[]): (() => Promise<void>) => {
+    const completed = new Set<string>();
+    let closing: Promise<void> | null = null;
+
+    return async (): Promise<void> => {
+        if (completed.size === steps.length) return;
+        if (closing) return closing;
+
+        closing = (async () => {
+            const errors: Error[] = [];
+            for (const step of steps) {
+                if (completed.has(step.name)) continue;
+                try {
+                    await step.run();
+                    completed.add(step.name);
+                } catch (error) {
+                    errors.push(new Error(`Failed to close resource: ${step.name}`, { cause: error }));
+                }
+            }
+            if (errors.length > 0) {
+                throw new AggregateError(errors, 'One or more resources failed to close.');
+            }
+        })();
+
+        try {
+            await closing;
+        } finally {
+            closing = null;
+        }
+    };
+};