The Betradar HTTP API's generic <response> envelope.
Every API endpoint can return this instead of its typed payload: as an error
body (response_code such as NOT_FOUND, with message/errors) or as the
acknowledgement of a write/command (booking, recovery, custom-bet submit).
Because it is shared across endpoints, it is the single root element whose name
collides between API groups, so dynamic dispatch maps "response" here.
Upstream defines it three times — error_response.xsd (sports API),
ErrorResponse.xsd (custom bet) and UnifiedFeedResponse.xsd — with slightly
different fields. This module is the hand-written union of those, since no
single XSD produces it; it lives under common/ (outside the generated api/
tree) so mix uof.schemas.gen neither overwrites nor removes it.