fn parse_refresh_ttl(config: &HashMap<String, Value>) -> Result<bool, String>Expand description
Parses the optional refresh_ttl flag.
Defaults to false, which keeps the expiry pinned to the key’s creation.
That default is load-bearing: a retry bound whose expiry refreshed on every
increment could be held open indefinitely by the very client it limits.
Setting it to true is the deliberate opposite – a sliding window of
“N events within ttl_seconds of each other”.