Gate /api/bar/* behind the localhost-when-auth-disabled guard (single DRY
choke point) so native quota/tier/cost can't leak on a non-loopback bind with
auth disabled; add a guard test. Delete the dishonest maxRedirections test that
asserted the opposite of the production redirect hardening. Key per-account
today-cost on the local day (matching analytics) instead of UTC. Stop the
inner 429 retry in the Claude usage fetch so the outer cache + circuit breaker
honor Retry-After. Narrow the usage-transformer map type and fix stale
doc-comments; clarify the one-alert-per-reset-window quota rule; gitignore the
local demo scaffolding.