Commit 訊息撰寫

RECOMMENDED fix(payments): retry webhooks and correct timeout handling Transient failures caused webhook events to be dropped too early. Retries improve delivery reliability, while proper timeouts prevent hangs. fix(webhooks): add retries and resolve payment timeout bug Payment callbacks could fail permanently during temporary outages. Retry logic and corrected timeouts make processing more resilient. fix(payment-webhook): handle retries and timeouts reliably Intermittent network issues could interrupt payment notifications. This prevents lost events and ensures requests terminate as expected.