Mints a single-use, per-interaction survey link carrying your context metadata (interaction id, channel, agent, trigger event, arbitrary metadata). Send the returned inviteUrl to your customer over any channel.

The raw link is returned exactly once — it is stored hashed and cannot be recovered later.

Survey-fatigue caps apply per contact (contactId or externalCustomerRef): when the org's cap is hit the call still returns 200 with result: "suppressed" and a nextEligibleAt timestamp, and no link is created. Handle both result shapes.