CHW-5104 TokenIssueFailed

unable to issue session token; please retry

Default message: unable to issue session token; please retry
HTTP status: 500 (server)

Problem. JWT minting failed after the user was successfully authenticated. Cause. HMAC signing failure — most commonly an ephemeral JWT secret that has rotated mid-flight. Fix. Retry; if the error persists the deployment is signing with a per-process ephemeral secret — set a stable CHAINSAW_JWT_SECRET (openssl rand -hex 32) and restart. HTTP 500.