Creates a reusable set of custom normalization rules.

Use this when the same custom normalization applies across many Prepare calls: save the rules once here, then reference the returned id in a Prepare call's config.normalizationRules.configId instead of passing the rules inline on every request.

Provide name, an optional description, and the rules grouped by rule group. Server-assigned fields — id, status, and timestamps — are ignored on input and returned in the response.

Returns 201 with the created config. Returns 400 if the payload is malformed — for example an unknown rule group, or a type/value combination that is not allowed for its group.

This endpoint does not consume credits.