OptionalNEVER_STALE?: stringextra comma-separated path prefixes never answered from a previous generation
OptionalPAGE_KV?: PageKvoptional: the tier is absent rather than broken when this is not bound
OptionalPAGE_KV_ENABLED?: stringforce the tier on ('1') or off ('0'), overriding the per-plan default
OptionalPAGE_KV_TTL?: string | numberseconds; pages are generation-keyed, so this is a floor on garbage, not a freshness knob
the bindings and levers the KV page tier reads