Per RFC-WS-6 §Q3 v1.3 addition 2.
Centralises the Throwable -> failure_response_code mapping so the
listener (ApplyBindingsOnFormSubmit::handle catch block) and the
retry-service (FormFailureRetryService::recordFailure) produce
identical classifications. Single behaviour-change point.
Resolution order: FormBindingApplicatorException subclass dispatch via
reasonCode(); fallback 'unknown_error' for anything outside the hierarchy.
Wiring into the listener and the retry service lands in D2.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
bert.hausmans
1f66fef3c8