CHW-1407 PaddleWebhookNotConfigured

paddle webhook not configured; operator must set the webhook secret before paddle events can be accepted

Default message: paddle webhook not configured; operator must set the webhook secret before paddle events can be accepted
HTTP status: 503 (server)

Problem. /api/paddle/webhook returned 503 without processing the event. Cause. The instance has no webhook secret, so HMAC verification cannot possibly succeed; the handler fails closed rather than accepting unverified bodies. Fix. Set the webhook secret env var and restart; Paddle will retry the delivery on its usual schedule. HTTP 503.