Engine admission records

Every engine rypsok can query has an admission record (REQ-CMP-001): the endpoint, the permitted use, how rypsok identifies itself, the rate and concurrency the provider allows, storage and attribution rules, what the driver can honor, and the live check that detects format drift. The record is the source of the driver’s properties in code; a change to one is a change to the other.

Live checks run from .github/workflows/external-checks.yml: in the release checks before every release and on demand, never on a timer, on a pull request or as a gate (REQ-TEST-003). They send one fixed query per driver to the real endpoint and assert that the response parses; a failure means the provider changed its format or its terms and the driver and the record need review.