Validates a candidate book-policy definition without registering it.
Returns { ok: true, value } when the object would pass
defineBookPolicy, or { ok: false, errors } with machine-readable
issue codes such as policy.playtypes_empty, policy.invalid_pick_count,
and policy.unknown_payout_model.
Validates a candidate book-policy definition without registering it.
Returns
{ ok: true, value }when the object would passdefineBookPolicy, or{ ok: false, errors }with machine-readable issue codes such aspolicy.playtypes_empty,policy.invalid_pick_count, andpolicy.unknown_payout_model.