CHW-4412 BillyPolicyStoreError
policy store rejected the draft; fix the validation issue and retry
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Default message: policy store rejected the draft; fix the validation issue and retry
HTTP status:400(client)
Problem. A Billy-dispatched policy mutation was rejected by the policy store. Cause. Validation error inside the policy package (bad coordinate shape, malformed rule, etc.) — the underlying error message is surfaced verbatim. Fix. Fix the validation issue and retry. HTTP 400.