Regenerate the OpenAPI document for the error-code catalogue

The catalogue lists the answers and restart codes and no longer the
retired step ones, and the generated document quotes that list. The
skippable-step id type nothing read goes with it.

src/lib/onboarding/needs.ts

@@ -67,9 +67,6 @@ export const ONBOARDING_SKIPPABLE_STEP_IDS = [
   "first-result",
 ] as const;
 
-export type OnboardingSkippableStepId =
-  (typeof ONBOARDING_SKIPPABLE_STEP_IDS)[number];
-
 /**
  * Q1 — whose record this is. The vocabularies below are pinned against the
  * registry's derivation input with `satisfies`, so a value added here that the