LicenseCapExceededException + @ControllerAdvice mapping to 403 with a
body that includes state, limit, current, cap, and a per-state human
message templated by LicenseMessageRenderer (covers ABSENT/ACTIVE/
GRACE/EXPIRED/INVALID with day counts and reason). Adds the forState()
overload now (used by the /usage endpoint in Task 30) so both surfaces
share identical phrasing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>