CHW-3404 PaddleCheckoutFailed

paddle did not accept the checkout / subscription update request; retry shortly and if it persists contact support

Default message: paddle did not accept the checkout / subscription update request; retry shortly and if it persists contact support
HTTP status: 502 (server)

Problem. /api/billing/checkout returned 502 after calling Paddle. Cause. CreateTransactionForCheckout or UpdateSubscriptionItems returned an error — Paddle outage, rate limit, or rejected price ID. Fix. Retry shortly; the cause is logged with the org ID and subscription ID. Persistent failure means Paddle is degraded — check status.paddle.com. HTTP 502.