CHW-3406 PaddlePortalFailed

could not open the paddle billing portal; retry shortly

Default message: could not open the paddle billing portal; retry shortly
HTTP status: 502 (server)

Problem. /api/billing/portal could not mint a session. Cause. Paddle rejected the CreatePortalSession call (customer deleted, upstream outage). Fix. Retry shortly; if persistent, contact support so the Paddle customer record can be reconciled. HTTP 502.