Refersion Rate Limits

Rate-limiting posture for the Refersion REST and GraphQL APIs. Refersion publishes NO request-rate limit — no requests-per-second, no requests-per-minute, no daily quota — for any surface, and returns NO rate-limit response headers. What the contract DOES declare is a set of hard payload-size caps, and it signals one of them with HTTP 429, which is the single most misleading thing about this API's throttling behaviour: a 429 from Refersion means "your array is too big", not "slow down", so an exponential-backoff retry of the identical request will fail forever.