A token answer without a usable expires_in (absent, non-numeric, a string that
is not a positive integer) now takes the descriptor's
defaultAccessTokenLifetimeSeconds (3600 for every provider), so no issued
token has a NULL expiry that dueForRefresh would never refresh. A 2xx whose
refresh_token is present but not a string is the typed
provider_body_not_token_set (502 managed_credential_refresh_failed, tokens
kept); an empty string stays a missing token, so a rotating provider still
fails closed. The expiry rule is now pinned on memory and both live Postgres
rigs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
a32be41878