feat(utils): add retry utility

src/utils/retryUtils.ts

@@ -0,0 +1,17 @@
+// Retry utility for API calls
+export interface RetryOptions { maxRetries?: number; delay?: number; backoff?: number; }
+export async function withRetry<T>(fn: () => Promise<T>, options: RetryOptions = {}): Promise<T> {
+  const { maxRetries = 3, delay = 1000, backoff = 2 } = options;
+  let lastError: Error | undefined;
+  for (let attempt = 0; attempt <= maxRetries; attempt++) {
+    try { return await fn(); }
+    catch (error) {
+      lastError = error instanceof Error ? error : new Error(String(error));
+      if (attempt < maxRetries) {
+        const waitTime = delay * Math.pow(backoff, attempt);
+        await new Promise(resolve => setTimeout(resolve, waitTime));
+      }
+    }
+  }
+  throw lastError;
+}