Interface IPolicyEngine

interface IPolicyEngine {
    evaluate(
        gate: {
            id: string;
            afterStage: string;
            beforeStage: string;
            rules: string[];
            onFail: "warn" | "block" | "escalate";
        },
        context: PolicyContext,
    ): PolicyDecision;
    registerRule(rule: PolicyRule): void;
    listRules(): readonly PolicyRule[];
}