fix: cap rate-limit backoff to daily ebay poll window

convex/ebay.ts

@@ -184,7 +184,11 @@ function isRateLimitError(message: string): boolean {
 }
 
 function getBackoffMs(consecutiveFailures: number, rateLimited: boolean) {
-  const base = rateLimited ? 2 * BASE_REFRESH_MS : BASE_REFRESH_MS / 2
+  if (rateLimited) {
+    return BASE_REFRESH_MS
+  }
+
+  const base = BASE_REFRESH_MS / 2
   const multiplier = Math.max(1, consecutiveFailures)
   return Math.min(base * multiplier, MAX_BACKOFF_MS)
 }