pub fn decorate(headers: &mut HeaderMap, dep: &CompiledDeprecation)Expand description
Stamp a route’s deprecation policy onto a response (DW-048).
Deprecation and Sunset REPLACE any upstream-sent values (the
gateway is the source of truth for the policy it is configured to
emit — the same rule as the X-RateLimit-* headers); Link is
APPENDED (a list header: upstream links must survive). Unbuildable
values are skipped, never panic — validation has already rejected
them for publishable configs, so this is only a generation-tear
backstop, the same posture as the respond-action headers.