Address PR review follow-ups for retry status handling

src/shared/retry-status-utils.ts

@@ -0,0 +1,19 @@
+export function normalizeRetryStatusMessage(message: string): string {
+  return message
+    .replace(/\[retrying in [^\]]*attempt\s*#\d+\]/gi, "[retrying]")
+    .replace(/retrying in\s+[^(]*attempt\s*#\d+/gi, "retrying")
+    .replace(/\s+/g, " ")
+    .trim()
+    .toLowerCase()
+}
+
+export function extractRetryAttempt(statusAttempt: unknown, message: string): string {
+  if (typeof statusAttempt === "number" && Number.isFinite(statusAttempt)) {
+    return String(statusAttempt)
+  }
+  const attemptMatch = message.match(/attempt\s*#\s*(\d+)/i)
+  if (attemptMatch?.[1]) {
+    return attemptMatch[1]
+  }
+  return "?"
+}