refactor(memory): share batch create retry

src/memory/batch-http.ts

@@ -0,0 +1,38 @@
+import { retryAsync } from "../infra/retry.js";
+
+export async function postJsonWithRetry<T>(params: {
+  url: string;
+  headers: Record<string, string>;
+  body: unknown;
+  errorPrefix: string;
+}): Promise<T> {
+  const res = await retryAsync(
+    async () => {
+      const res = await fetch(params.url, {
+        method: "POST",
+        headers: params.headers,
+        body: JSON.stringify(params.body),
+      });
+      if (!res.ok) {
+        const text = await res.text();
+        const err = new Error(`${params.errorPrefix}: ${res.status} ${text}`) as Error & {
+          status?: number;
+        };
+        err.status = res.status;
+        throw err;
+      }
+      return res;
+    },
+    {
+      attempts: 3,
+      minDelayMs: 300,
+      maxDelayMs: 2000,
+      jitter: 0.2,
+      shouldRetry: (err) => {
+        const status = (err as { status?: number }).status;
+        return status === 429 || (typeof status === "number" && status >= 500);
+      },
+    },
+  );
+  return (await res.json()) as T;
+}